GOST 5632-72 High-alloy steels and corrosion-resistant, heat-resistant and high-temperature alloys. Grades
GOST 5632-72 · General fastener standards
This is an informational translation of a Russian national standard. The Russian original is authoritative.
GOST 5632-72 applies to wrought steels and alloys on an iron-nickel or nickel base, intended for use in corrosive environments and at high temperatures.
High-alloy steels are conventionally defined as alloys with a mass fraction of iron exceeding 45% and a total mass fraction of alloying elements of at least 10% (at the upper limit), with a mass fraction of at least one element of at least 8% (at the lower limit).
Iron-nickel-base alloys are alloys whose primary structure is a solid solution of chromium and other alloying elements in an iron-nickel base (the sum of nickel and iron exceeding 65%, with an approximate nickel-to-iron ratio of 1:1.5).
Nickel-base alloys are alloys whose primary structure is a solid solution of chromium and other alloying elements in a nickel base (nickel content of at least 50%).
The standard was developed taking into account the requirements of international standards ISO 683-13, ISO 683-15, ISO 683-16, ISO 4955.
| Designation of the referenced regulatory document | Clause, subclause, item, appendix number |
|---|---|
| GOST 7565-81 | 2.12 |
| GOST 12344-2003 | 2.12 |
| GOST 12345-2001 | 2.12 |
| GOST 12346-78 | 2.12 |
| GOST 12347-77 | 2.12 |
| GOST 12348-78 | 2.12 |
| GOST 12349-83 | 2.12 |
| GOST 12350-78 | 2.12 |
| GOST 12351-2003 | 2.12 |
| GOST 12352-81 | 2.12 |
| GOST 12353-78 | 2.12 |
| GOST 12354-81 | 2.12 |
| GOST 12355-78 | 2.12 |
| GOST 12356-81 | 2.12 |
| GOST 12357-84 | 2.12 |
| GOST 12358-2002 | 2.12 |
| GOST 12359-99 | 2.12 |
| GOST 12360-82 | 2.12 |
| GOST 12361-2002 | 2.12 |
| GOST 12362-79 | 2.12 |
| GOST 12363-79 | 2.12 |
| GOST 12364-84 | 2.12 |
| GOST 12365-84 | 2.12 |
| GOST 17051-82 | 2.12 |
| GOST 17745-90 | 2.12 |
| GOST 24018.0-90 | 2.12 |
| GOST 24018.1-80 - 24018.6-80 | 2.12 |
| GOST 28473-90 | 2.12 |
1. Classification
1.1. Depending on their basic properties, steels and alloys are divided into groups:
I - corrosion-resistant (stainless) steels and alloys, resistant to electrochemical and chemical corrosion (atmospheric, soil, alkaline, acid, saline), intergranular corrosion, stress corrosion, etc.;
II - heat-resistant (scale-resistant) steels and alloys, resistant to chemical surface degradation in gaseous environments at temperatures above 550 °C, operating in an unloaded or lightly loaded state;
III - heat-resisting steels and alloys, capable of operating under load at high temperatures for a specified period of time while retaining sufficient resistance.
1.2. Depending on their structure, steels are divided into classes: martensitic, martensitic-ferritic (at least 10% ferrite in the structure along with martensite), ferritic (without transformations), austenitic-martensitic, austenitic-ferritic (more than 10% ferrite), austenitic.
The classification of steels into classes by structural characteristics is conventional and is based on the primary structure obtained upon air-cooling of the steel after high-temperature heating. Therefore, structural deviations cannot serve as grounds for rejecting the steel.
1.3. Depending on their chemical composition, alloys are divided into classes by the primary constituent element: iron-nickel-base alloys; nickel-base alloys.
2. Grades and chemical composition
2.1. The grades and chemical composition of steels and alloys shall conform to those specified in Table 1. The composition of steels and alloys produced using special melting and remelting methods shall conform to the requirements of Table 1, unless a different mass fraction of elements is specified in the standards or technical specifications for the metal products. The names of special melting and remelting methods are given in Note 7 to Table 1.
Table 1
| Grade of steels and alloys | Mass fraction of elements, % | Group | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade No. | New designation | Old designation | Carbon | Silicon | Manganese | Chromium | Nickel | Titanium | Aluminium | Tungsten | Molybdenum | Niobium | Vanadium | Iron | Sulfur | Phosphorus | Other elements | I corrosion-resistant | II heat-resistant | III heat-resisting |
| Max | ||||||||||||||||||||
| STEELS 1. Martensitic-class steels | ||||||||||||||||||||
| 1-5 | 40×9S2 | 4×9S2 | 0.35-0.45 | 2.0-3.0 | Not more than 0.8 | 8.0-10.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | - | ++ | + |
| 1-6 | 40×10S2M | 4×10S2M, EI107 | 0.35-0.45 | 1.9-2.6 | Not more than 0.8 | 9.0-10.5 | - | - | - | - | 0.7-0.9 | - | - | Bal. | 0.025 | 0.030 | - | - | ++ | + |
| 1-7 | 15×11MF | 1×11MF | 0.12-0.19 | Not more than 0.5 | Not more than 0.7 | 10.0-11.5 | - | - | - | - | 0.6-0.8 | - | 0.25-0.40 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 1-8 | 18×11MNFB | 2×11MFBN, EP291 | 0.15-0.21 | Not more than 0.6 | 0.6-1.0 | 10.0-11.5 | 0.5-1.0 | - | - | - | 0.8-1.1 | 0.20-0.45 | 0.20-0.40 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 1-9 | 20×12VNMF | 2×12VNMF, EP428 | 0.17-0.23 | Not more than 0.6 | 0.5-0.9 | 10.5-12.5 | 0.5-0.9 | - | - | 0.7- 1.1 | 0.5-0.7 | - | 0.15-0.30 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 1-10 | 11×11N2V2MF | Kh12N2VMF, EI962 | 0.09-0.13 | Not more than 0.6 | Not more than 0.6 | 10.5-12.0 | 1.5-1.8 | - | - | 1.6- 2.0 | 0.35-0.50 | - | 0.18-0.30 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 1-11 | 16×11N2V2MF | 2×12N2VMF, EI962A | 0.14-0.18 | Not more than 0.6 | Not more than 0.6 | 10.5-12.0 | 1.4-1.8 | - | - | 1.6- 2.0 | 0.35-0.50 | - | 0.18-0.30 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 1-12 | 20×13 | 2×13 | 0.16-0.25 | Not more than 0.8 | Not more than 0.8 | 12.0-14.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | ++ | - | + |
| 1-13 | 30×13 | 3×13 | 0.26-0.35 | Not more than 0.8 | Not more than 0.8 | 12.0-14.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | + | - | - |
| 1-14 | 40×13 | 4×13 | 0.36-0.45 | Not more than 0.8 | Not more than 0.8 | 12.0-14.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | + | - | - |
| 1-15 | 30×13N7S2 | 3×13N7S2, EI72 | 0.25-0.34 | 2.0-3.0 | Not more than 0.8 | 12.0-14.0 | 6.0-7.5 | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | - | + | - |
| 1-16 | 13×14N3V2FR | Kh14NVFR, EI736 | 0.10-0.16 | Not more than 0.6 | Not more than 0.6 | 13.0-15.0 | 2.8-3.4 | Not more than 0.05 | - | 1.6-2.2 | - | - | 0.18-0.28 | Bal. | 0.025 | 0.030 | Boron not more than 0.004 | - | - | + |
| 1-17 | 25×13N2 | 2×14N2, EI474 | 0.2-0.3 | Not more than 0.5 | 0.8-1.2 | 12.0-14.0 | 1.5-2.0 | - | - | - | - | - | - | Bal. | 0.15-0.25 | 0.08-0.15 | - | + | - | - |
| 1-18 | 20×17N2 | 2×17N2 | 0.17-0.25 | Not more than 0.8 | Not more than 0.8 | 16.0-18.0 | 1.5-2.5 | - | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 1-19 | 95×18 | 9×18, EI229 | 0.9-1.0 | Not more than 0.8 | Not more than 0.8 | 17.0-19.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | + | - | - |
| 1-20 | 09×16N4B | EP56 | 0.08-0.12 | Not more than 0.6 | Not more than 0.5 | 15.0-16.5 | 4.0-4.5 | - | - | - | - | 0.05-0.15 | - | Bal. | 0.015 | 0.030 | - | ++ | - | - |
| 1-21 | 13Kh11N2V2MF | 1×12N2VMF, EI961 | 0.10-0.16 | Not more than 0.6 | Not more than 0.6 | 10.5-12.0 | 1.50-1.80 | - | - | 1.60-2.00 | 0.35-0.50 | - | 0.18-0.30 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 1-22 | 07×16N4B | - | 0.05-0.10 | Not more than 0.6 | 0.2-0.5 | 15.0-16.5 | 3.5-4.5 | - | - | - | - | 0.20-0.40 | - | Bal. | 0.020 | 0.025 | - | ++ | - | - |
| 1-23 | 65×13 | - | 0.60-0.70 | 0.2-0.5 | 0.25-0.80 | 12.0-14.0 | Not more than 0.5 | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | ++ | - | - |
| 2. Martensitic-ferritic class steels | ||||||||||||||||||||
| 2-2 | 15×12VNMF | 1×12VNMF, EI802 | 0.12-0.18 | Not more than 0.4 | 0.5-0.9 | 11.0-13.0 | 0.4-0.8 | - | - | 0.7-1.1 | 0.5-0.7 | - | 0.15-0.30 | Bal. | 0.025 | 0.030 | - | - | - | + |
| 2-3 | 18×12VMBFR | 2×12VMBFR, EI993 | 0.15-0.22 | Not more than 0.5 | Not more than 0.5 | 11.0-13.0 | - | - | - | 0.4-0.7 | 0.4-0.6 | 0.2-0.4 | 0.15-0.30 | Bal. | 0.025 | 0.030 | Boron not more than 0.003 | - | - | + |
| 2-4 | 12×13 | 1×13 | 0.09-0.15 | Not more than 0.8 | Not more than 0.8 | 12.0-14.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | ++ | + | + |
| 2-5 | 14×17N2 | 1×17N2, EI268 | 0.11-0.17 | Not more than 0.8 | Not more than 0.8 | 16.0-18.0 | 1.5-2.5 | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | ++ | - | + |
| 3. Ferritic class steels | ||||||||||||||||||||
| 3-1 | 10×13SYu | 1×12SYu, EI404 | 0.07-0.12 | 1.2-2.0 | Not more than 0.8 | 12.0-14.0 | - | - | 1.0-1.8 | - | - | - | - | Bal. | 0.025 | 0.030 | - | - | + | - |
| 3-2 | 08×13 | 0×13, EI496 | Not more than 0.08 | Not more than 0.8 | Not more than 0.8 | 12.0-14.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.030 | - | + | - | + |
| 3-3 | 12×17 | Kh17 | Not more than 0.12 | Not more than 0.8 | Not more than 0.8 | 16.0-18.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | ++ | + | - |
| 3-4 | 08×17T | 0×17T, EI645 | Not more than 0.08 | Not more than 0.8 | Not more than 0.8 | 16.0-18.0 | - | 5·S-0.80 | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | ++ | - |
| 3-5 | 15×18SYu | Kh18SYu, EI484 | Not more than 0.15 | 1.0-1.5 | Not more than 0.8 | 17.0-20.0 | - | - | 0.7-1.2 | - | - | - | - | Bal. | 0.025 | 0.035 | - | - | + | - |
| 3-6 | 15×25T | Kh25T, EI439 | Not more than 0.15 | Not more than 1.0 | Not more than 0.8 | 24.0-27.0 | - | 5·S-0.90 | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | ++ | - |
| 3-7 | 15×28 | Kh28, EI349 | Not more than 0.15 | Not more than 1.0 | Not more than 0.8 | 27.0-30.0 | - | - | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | ++ | - |
| 3-8 | 08×18T1 | 0×18T1 | Not more than 0.08 | Not more than 0.8 | Not more than 0.7 | 17.0-19.0 | - | 0.6-1.0 | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | ++ | - |
| 3-9 | 08×18Tch | DI-77 | Not more than 0.08 | Not more than 0.8 | Not more than 0.8 | 17.0-19.0 | - | 5·S-0.60 | Not more than 0.1 | - | - | - | - | Bal. | 0.025 | 0.035 | Cerium not more than 0.1 (calc.). Calcium not more than 0.05 (calc.) | + | - | - |
| 4. Austenitic-martensitic class steels | ||||||||||||||||||||
| 4-1 | 20×13N4G9 | 2×13N4G9, EI100 | 0.15-0.30 | Not more than 0.8 | 8.0-10.0 | 12.0-14.0 | 3.7-4.7 | - | - | - | - | - | - | Bal. | 0.025 | 0.050 | - | + | - | - |
| 4-2 | 09×15N8Yu1 | Kh15N9Yu, EI904 | Not more than 0.09 | Not more than 0.8 | Not more than 0.8 | 14.0-16.0 | 7.0-9.4 | - | 0.7-1.3 | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 4-3 | 07X16H6 | Kh16N6, EP288 | 0.05-0.09 | Not more than 0.8 | Not more than 0.8 | 15.5-17.5 | 5.0-8.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 4-4 | 09×17N7Yu | 0×17N7Yu | Not more than 0.09 | Not more than 0.8 | Not more than 0.8 | 16.0-17.5 | 7.0-8.0 | - | 0.5-0.8 | - | - | - | - | Bal. | 0.020 | 0.030 | - | + | - | - |
| 4-5 | 09×17N7Yu1 | 0×17N7Yu1 | Not more than 0.09 | Not more than 0.8 | Not more than 0.8 | 16.5-18.0 | 6.5-7.5 | - | 0.7-1.1 | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 4-6 | 08×17N5M3 | Kh17N5M3, EI925 | 0.06-0.10 | Not more than 0.8 | Not more than 0.8 | 16.0-17.5 | 4.5-5.5 | - | - | - | 3.0-3.5 | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 4-7 | 08×17N6T | DI-21 | Not more than 0.08 | Not more than 0.8 | Not more than 0.8 | 16.5-18.0 | 5.5-6.5 | 0.15-0.35 | - | - | - | - | - | Bal. | 0.020 | 0.035 | Boron not more than 0.003 | + | - | - |
| 5. Austenitic-ferritic class steels | ||||||||||||||||||||
| 5-1 | 08×20N14S2 | 0×20N14S2, EI732 | Not more than 0.08 | 2.0-3.0 | Not more than 1.5 | 19.0-22.0 | 12.0-15.0 | - | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | - | + | - |
| 5-2 | 20×20N14S2 | Kh20N14S2, EI211 | Not more than 0.20 | 2.0-3.0 | Not more than 1.5 | 19.0-22.0 | 12.0-15.0 | - | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | - | + | - |
| 5-3 | 08×22N6T | 0×22N5T, EP53 | Not more than 0.08 | Not more than 0.8 | Not more than 0.8 | 21.0-23.0 | 5.3-6.3 | 5·S-0.65 | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 5-4 | 12×21N5T | 1×21N5T, EI811 | 0.09-0.14 | Not more than 0.8 | Not more than 0.8 | 20.0-22.0 | 4.8-5.8 | 0.25-0.50 | Not more than 0.08 | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 5-5 | 08Kh21N6M2T | 0×21N6M2T, EP54 | Not more than 0.08 | Not more than 0.8 | Not more than 0.8 | 20.0-22.0 | 5.5-6.5 | 0.20-0.40 | - | - | 1.8-2.5 | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 5-6 | 20×23N13 | Kh23N13, EI319 | Not more than 0.20 | Not more than 1.0 | Not more than 2.0 | 22.0-25.0 | 12.0-15.0 | - | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | - | + | - |
| 5-7 | 08×18G8N2T | 0×18G8N2T, KO-3 | Not more than 0.08 | Not more than 0.8 | 7.0-9.0 | 17.0-19.0 | 1.8-2.8 | 0.20-0.50 | - | - | - | - | - | Bal. | 0.025 | 0.035 | - | + | - | - |
| 5-8 | 15×18N12S4TYu | EI654 | 0.12-0.17 | 3.8-4.5 | 0.5-1.0 | 17.0-19.0 | 11.0-13.0 | 0.4-0.7 | 0.13-0.35 | - | - | - | - | Bal. | 0.030 | 0.035 | - | + | - | - |
| 5-9 | 03×23N6 | - | Not more than 0.030 | Not more than 0.4 | 1.0-2.0 | 22.0-24.0 | 5.3-6.3 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | - | - |
| 5-10 | 03×22N6M2 | - | Not more than 0.030 | Not more than 0.4 | 1.0-2.0 | 21.0-23.0 | 5.5-6.5 | - | - | - | 1.8-2.5 | - | - | Bal. | 0.020 | 0.035 | - | ++ | - | - |
| 6. Austenitic steels | ||||||||||||||||||||
| 6-1 | 08×10N20T2 | 0×10N20T2 | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 10.0-12.0 | 18.0-20.0 | 1.5-2.5 | Not more than 1.0 | - | - | - | - | Bal. | 0.030 | 0.035 | - | + | - | - |
| 6-2 | 10×11N20T3R | Kh12N20T3R, EI696 | Not more than 0.10 | Not more than 1.0 | Not more than 1.0 | 10.0-12.5 | 18.0-21.0 | 2.6-3.2 | Not more than 0.8 | - | - | - | - | Bal. | 0.020 | 0.035 | Boron 0.008-0.02 | - | - | + |
| 6-3 | 10Kh11N23T3MR | Kh12N22T3MR, EP33 | Not more than 0.10 | Not more than 0.6 | Not more than 0.6 | 10.0-12.5 | 21.0-25.0 | 2.6-3.2 | Not more than 0.8 | - | 1.0-1.6 | - | - | Bal. | 0.010 | 0.025 | Boron not more than 0.02 | - | - | + |
| 6-4 | 37×12N8G8MFB | 4×12N8G8MFB, EI481 | 0.34-0.40 | 0.3-0.8 | 7.5-9.5 | 11.5-13.5 | 7.0-9.0 | - | - | - | 1.1-1.4 | 0.25-0.45 | 1.3-1.6 | Bal. | 0.030 | 0.035 | - | - | - | + |
| 6-6 | 10×14G14N4T | Kh14G14N3T, EI711 | Not more than 0.10 | Not more than 0.8 | 13.0-15.0 | 13.0-15.0 | 2.8-4.5 | 5·(C- 0.02)- 0.6 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-7 | 10×14AG15 | Kh14AG15, DI-13 | Not more than 0.10 | Not more than 0.8 | 14.5-16.5 | 13.0-15.0 | - | - | - | - | - | - | - | Bal. | 0.030 | 0.045 | Nitrogen 0.15-0.25 | + | - | - |
| 6-8 | 45×14N14V2M | 4×14N14V2M, EI69 | 0.40-0.50 | Not more than 0.8 | Not more than 0.7 | 13.0-15.0 | 13.0-15.0 | - | - | 2.0-2.8 | 0.25-0.40 | - | - | Bal. | 0.020 | 0.035 | - | - | - | + |
| 6-10 | 09×14N19V2BR | 1×14N18V2BR, EI695R | 0.07-0.12 | Not more than 0.6 | Not more than 2.0 | 13.0-15.0 | 18.0-20.0 | - | - | 2.0-2.8 | - | 0.9-1.3 | - | Bal. | 0.020 | 0.035 | Boron not more than 0.05; cerium not more than 0.02 | - | - | + |
| 6-11 | 09×14N19V2BR1 | 1×14N18V2BR1, EI726 | 0.07-0.12 | Not more than 0.6 | Not more than 2.0 | 13.0-15.0 | 18.0-20.0 | - | - | 2.0-2.8 | - | 0.9-1.3 | - | Bal. | 0.020 | 0.035 | Boron not more than 0.03; cerium not more than 0.02 | - | - | + |
| 6-12 | 40×15N7G7F2MS | 4×15N7G7F2MS, EI388 | 0.38-0.47 | 0.9-1.4 | 6.0-8.0 | 14.0-16.0 | 6.0-8.0 | - | - | - | 0.65-0.95 | - | 1.5-1.9 | Bal. | 0.020 | 0.035 | - | - | - | + |
| 6-13 | 08×16N13M2B | 1×16N13M2B, EI680 | 0.06-0.12 | Not more than 0.8 | Not more than 1.0 | 15.0-17.0 | 12.5-14.5 | - | - | - | 2.0-2.5 | 0.9-1.3 | - | Bal. | 0.020 | 0.035 | - | - | - | + |
| 6-14 | 08X15H24B4TP | Kh15N24V4T, EP164 | Not more than 0.08 | Not more than 0.6 | 0.5-1.0 | 14.0-16.0 | 22.0-25.0 | 1.4-1.8 | - | 4.0-5.0 | - | - | - | Bal. | 0.020 | 0.035 | Boron not more than 0.005; cerium not more than 0.03 | - | - | + |
| 6-16 | 03×16N15M3B | 00×16N15M3B, EI844B | Not more than 0.03 | Not more than 0.6 | Not more than 0.8 | 15.0-17.0 | 14.0-16.0 | - | - | - | 2.5-3.0 | 0.25-0.50 | - | Bal. | 0.015 | 0.020 | - | + | - | - |
| 6-17 | 09×16N15M3B | Kh16N15M3B, EI847 | Not more than 0.09 | Not more than 0.8 | Not more than 0.8 | 15.0-17.0 | 14.0-16.0 | - | - | - | 2.5-3.0 | 0.6-0.9 | - | Bal. | 0.020 | 0.035 | - | - | - | + |
| 6-19 | 12×17G9AN4 | Kh17G9AN4, EI878 | Not more than 0.12 | Not more than 0.8 | 8.0-10.5 | 16.0-18.0 | 3.5-4.5 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | Nitrogen 0.15-0.25 | + | - | - |
| 6-20 | 03×17N14M3 | 000×17N13M2 | Not more than 0.030 | Not more than 0.4 | 1.0-2.0 | 16.8-18.3 | 13.5-15.0 | - | - | - | 2.2-2.8 | - | - | Bal. | 0.020 | 0.030 | - | + | - | - |
| 6-21 | 08×17N13M2T | 0X17H13M2T | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 16.0-18.0 | 12.0-14.0 | 5·C-0.7 | - | - | 2.0-3.0 | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-22 | 10Kh17N13M2T | Kh17N13M2T, EI448 | Not more than 0.10 | Not more than 0.8 | Not more than 2.0 | 16.0-18.0 | 12.0-14.0 | 5·C-0.7 | - | - | 2.0-3.0 | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-23 | 10Kh17N13M3T | Kh17N13M3T, EI432 | Not more than 0.10 | Not more than 0.8 | Not more than 2.0 | 16.0-18.0 | 12.0-14.0 | 5·C-0.7 | - | - | 3.0-4.0 | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-24 | 08×17N15M3T | 0×17N16M3T, EI580 | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 16.0-18.0 | 14.0-16.0 | 0.3-0.6 | - | - | 3.0-4.0 | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-25 | 12×18N9 | Kh18N9 | Not more than 0.12 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 8.0-10.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | - |
| 6-26 | 17×18N9 | 2×18N9 | 0.13-0.21 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 8.0-10.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-27 | 12Kh18N9T | Kh18N9T | Not more than 0.12 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 8.0-9.5 | 5·C-0.8 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | + |
| 6-28 | 04×18N10 | 00×18N10, EI842, EP550 | Not more than 0.04 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 9.0-11.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.030 | - | + | - | - |
| 6-29 | 08×18N10 | 0×18N10 | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 9.0-11.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | - |
| 6-30 | 08X18H10T | 0X18H10T, EI914 | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 9.0-11.0 | 5·C-0.7 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | - |
| 6-31 | 12Kh18N10T | Kh18N10T | Not more than 0.12 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 9.0-11.0 | 5·C-0.8 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | + |
| 6-32 | 12×18N10E | Kh18N10E, EP47 | Not more than 0.12 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 9.0-11.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | Selenium 0.18-0.35 | + | - | - |
| 6-33 | 03×18N11 | 000X18H11 | Not more than 0.030 | Not more than 0.8 | Not more than 0.7-2.0 | 17.0-19.0 | 10.5-12.5 | - | - | - | - | - | - | Bal. | 0.020 | 0.030 | - | + | - | - |
| 6-34 | 06×18N11 | 0×18N11, EI684 | Not more than 0.06 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 10.0-12.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-35 | 03×18N12 | 000×18N12 | Not more than 0.030 | Not more than 0.4 | Not more than 0.4 | 17.0-19.0 | 11.5-13.0 | Not more than 0.005 | - | - | - | - | - | Bal. | 0.020 | 0.030 | - | + | - | - |
| 6-36 | 08×18N12T | 0×18N12T | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 11.0-13.0 | 5·S-0.6 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-37 | 12×18N12T | Kh18N12T | Not more than 0.12 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 11.0-13.0 | 5·C-0.7 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | + |
| 6-38 | 08×18N12B | 0×18N12B, EI402 | Not more than 0.08 | Not more than 0.8 | Not more than 2.0 | 17.0-19.0 | 11.0-13.0 | - | - | - | - | 10·S-1.1 | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 6-39 | 31×19N9MVBT | 3×19N9MVBT, EI572 | 0.28-0.35 | Not more than 0.8 | 0.8-1.5 | 18.0-20.0 | 8.0-10.0 | 0.2-0.5 | - | 1.0-1.5 | 1.0-1.5 | 0.2-0.5 | - | Bal. | 0.020 | 0.035 | - | - | - | + |
| 6-40 | 36×18N25S2 | 4×18N25S2 | 0.32-0.40 | 2.0-3.0 | Not more than 1.5 | 17.0-19.0 | 23.0-26.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | - | + | - |
| 6-41 | 55×20G9AN4 | 5×20N4AG9, EI303 | 0.50-0.60 | Not more than 0.45 | 8.0-10.0 | 20.0-22.0 | 3.5-4.5 | - | - | - | - | - | - | Bal. | 0.020 | 0.040 | Nitrogen 0.30-0.60 | - | + | + |
| 6-42 | 07×21G7AN5 | Kh21G7AN5, EP222 | Not more than 0.07 | Not more than 0.7 | 6.0-7.5 | 19.5-21.0 | 5.0-6.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.030 | Nitrogen 0.15-0.25 | + | - | - |
| 6-43 | 03×21N21M4GB | 00×20N20M4B, ZI35 | Not more than 0.030 | Not more than 0.6 | 1.8-2.5 | 20.0-22.0 | 20.0-22.0 | - | - | - | 3.4-3.7 | S·15-0.8 | - | Bal. | 0.020 | 0.030 | - | + | - | - |
| 6-44 | 45×22N4M3 | 4×22N4M3, EP48 | 0.40-0.50 | 0.1-1.0 | 0.85-1.25 | 21.0-23.0 | 4.0-5.0 | - | - | - | 2.5-3.0 | - | - | Bal. | 0.030 | 0.035 | - | - | + | + |
| 6-45 | 10X23H18 | 0×23N18 | Not more than 0.10 | Not more than 1.0 | Not more than 2.0 | 22.0-25.0 | 17.0-20.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | - | ++ | + |
| 6-46 | 20×23N18 | Kh23N18, EI417 | Not more than 0.20 | Not more than 1.0 | Not more than 2.0 | 22.0-25.0 | 17.0-20.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | - | ++ | + |
| 6-47 | 20×25N20S2 | Kh25N20S2, EI283 | Not more than 0.20 | 2.0-3.0 | Not more than 1.5 | 24.0-27.0 | 18.0-21.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | - | + | - |
| 6-48 | 12×25N16G7AR | Kh25N16G7AR, EI835 | Not more than 0.12 | Not more than 1.0 | 5.0-7.0 | 23.0-26.0 | 15.0-18.0 | - | - | - | - | - | - | Bal. | 0.020 | 0.035 | Nitrogen 0.30-0.45; Boron not more than 0.010 | - | ++ | + |
| 6-49 | 10×11N20T2R | Kh12N20T2R, EI696A | Not more than 0.10 | Not more than 1.0 | Not more than 1.0 | 10.0-12.5 | 18.0-21.0 | 2.3-2.8 | Not more than 0.8 | - | - | - | - | Bal. | 0.020 | 0.030 | Boron not more than 0.008 | - | - | + |
| 6-51 | 03×18N10T | 00×18N10T | Not more than 0.030 | Not more than 0.8 | 1.0-2.0 | 17.0-18.5 | 9.5-11.0 | 5S-0.4 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | - |
| 6-52 | 05×18N10T | 0×18N10T | Not more than 0.05 | Not more than 0.8 | 1.0-2.0 | 17.0-18.5 | 9.0-10.5 | 5S-0.6 | - | - | - | - | - | Bal. | 0.020 | 0.035 | - | ++ | + | - |
Continuation of Table 1
| Grade of steels and alloys | Mass fraction of elements, % | Group | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade No. | New designation | Old designation | Carbon | Silicon | Manganese | Chromium | Nickel | Titanium | Aluminium | Tungsten | Molybdenum | Niobium | Vanadium | Iron | Sulfur | Phosphorus | Other elements | I corrosion-resistant | II heat-resistant | III heat-resisting |
| Max | ||||||||||||||||||||
| ALLOYS 7. Iron-nickel-based alloys | ||||||||||||||||||||
| 7-1 | KhN35VT | EI612 | Not more than 0.12 | Not more than 0.6 | 1.0-2.0 | 14.0-16.0 | 34.0-38.0 | 1.1-1.5 | - | 2.8-3.5 | - | - | - | Bal. | 0.020 | 0.030 | - | - | - | + |
| 7-2 | KhN35VTYu | EI787 | Not more than 0.08 | Not more than 0.6 | Not more than 0.6 | 14.0-16.0 | 33.0-37.0 | 2.4-3.2 | 0.7-1.4 | 2.8-3.5 | - | - | - | Bal. | 0.020 | 0.030 | Boron not more than 0.020 | - | - | + |
| 7-3 | KhN32T | Kh20N32T, EP670 | Not more than 0.05 | Not more than 0.7 | Not more than 0.7 | 19.0-22.0 | 30.0-34.0 | 0.25-0.60 | Not more than 0.5 | - | - | - | - | Bal. | 0.020 | 0.030 | - | - | - | + |
| 7-4 | KhN38VT | EI703 | 0.06-0.12 | Not more than 0.8 | Not more than 0.7 | 20.0-23.0 | 35.0-39.0 | 0.7-1.2 | Not more than 0.5 | 2.8-3.5 | - | - | - | Bal. | 0.020 | 0.030 | Cerium not more than 0.05 | - | ++ | + |
| 7-5 | KhN28VMAB | Kh21N28V5M3BAR, EP126 | Not more than 0.10 | Not more than 0.6 | Not more than 1.5 | 19.0-22.0 | 25.0-30.0 | - | - | 4.8-6.0 | 2.8-3.5 | 0.7-1.3 | - | Bal. | 0.020 | 0.020 | Boron not more than 0.005; nitrogen 0.15-0.30 | - | + | - |
| 7-6 | 06KhN28MDT | 0×23N28M3D3T, EI943 | Not more than 0.06 | Not more than 0.8 | Not more than 0.8 | 22.0-25.0 | 26.0-29.0 | 0.5-0.9 | - | - | 2.5-3.0 | - | - | Bal. | 0.020 | 0.035 | Copper 2.5-3.5 | + | - | - |
| 7-7 | 03KhN28MDT | 000×23N28M3D3T, EP516 | Not more than 0.030 | Not more than 0.8 | Not more than 0.8 | 22.0-25.0 | 26.0-29.0 | 0.5-0.9 | - | - | 2.5-3.0 | - | - | Bal. | 0.020 | 0.035 | Copper 2.5-3.5 | + | - | - |
| 7-8 | 06KhN28MT | 0×23N28M2T, EI628 | Not more than 0.06 | Not more than 0.8 | Not more than 0.8 | 22.0-25.0 | 26.0-29.0 | 0.40-0.70 | - | - | 1.80-2.50 | - | - | Bal. | 0.020 | 0.035 | - | + | - | - |
| 7-9 | KhN45Yu | EP747 | Not more than 0.10 | Not more than 1.0 | Not more than 1.0 | 15.0-17.0 | 44.0-46.0 | - | 2.9-3.9 | - | - | - | - | Bal. | 0.020 | 0.025 | Barium not more than 0.10; cerium not more than 0.03 | - | + | + |
| 8. Nickel-based alloys | ||||||||||||||||||||
| 8-1 | N70MFV | EP814A | Not more than 0.02 | Not more than 0.10 | Not more than 0.5 | Not more than 0.3 | Bal. | Not more than 0.15 | - | 0.10-0.45 | 25.0-27.0 | - | 1.4-1.7 | Not more than 0.8 | 0.012 | 0.015 | - | + | - | - |
| 8-2 | KhN65MV | 0×15N65M16V, EP567 | Not more than 0.03 | Not more than 0.15 | Not more than 1.0 | 14.5-16.5 | Bal. | - | - | 3.0-4.5 | 15.0-17.0 | - | - | Not more than 1.0 | 0.012 | 0.015 | - | + | - | - |
| 8-3 | KhN60VT | EI868 | Not more than 0.10 | Not more than 0.8 | Not more than 0.5 | 23.5-26.5 | Bal. | 0.3-0.7 | Not more than 0.5 | 13.0-16.0 | - | - | - | Not more than 4.0 | 0.013 | 0.013 | - | - | + | ++ |
| 8-4 | KhN60Yu | EI559A | Not more than 0.10 | Not more than 0.8 | Not more than 0.3 | 15.0-18.0 | 55.0-58.0 | - | 2.6-3.5 | - | - | - | - | Bal. | 0.020 | 0.020 | Barium not more than 0.10; cerium not more than 0.03 | - | ++ | + |
| 8-5 | KhN70Yu | EI652 | Not more than 0.10 | Not more than 0.8 | Not more than 0.3 | 26.0-29.0 | Bal. | - | 2.8-3.5 | - | - | - | - | Not more than 1.0 | 0.012 | 0.015 | Barium not more than 0.10; cerium not more than 0.03 | - | ++ | + |
| 8-6 | KhN78T | EI435 | Not more than 0.12 | Not more than 0.8 | Not more than 0.7 | 19.0-22.0 | Bal. | 0.15-0.35 | Not more than 0.15 | - | - | - | - | Not more than 1.0 | 0.010 | 0.015 | - | - | ++ | + |
| 8-7 | KhN75MBTYu | EI602 | Not more than 0.10 | Not more than 0.8 | Not more than 0.40 | 19.0-22.0 | Bal. | 0.35-0.75 | 0.35-0.75 | - | 1.8-2.3 | 0.9-1.3 | - | Not more than 3.0 | 0.012 | 0.020 | - | - | ++ | + |
| 8-8 | KhN80TBYu | EI607 | Not more than 0.08 | Not more than 0.8 | Not more than 1.0 | 15.0-18.0 | Bal. | 1.8-2.3 | 0.5-1.0 | - | - | 1.0-1.5 | - | Not more than 3.0 | 0.012 | 0.015 | - | - | - | + |
| 8-9 | KhN77TYuR | EI437B | Not more than 0.07 | Not more than 0.6 | Not more than 0.40 | 19.0-22.0 | Bal. | 2.4-2.8 | 0.6-1.0 | - | - | - | - | Not more than 1.0 | 0.007 | 0.015 | Boron not more than 0.01; cerium not more than 0.02; lead not more than 0.001 | - | - | + |
| 8-10 | KhN70VMYuT | EI765 | 0.10-0.16 | Not more than 0.6 | Not more than 0.5 | 14.0-16.0 | Bal. | 1.0-1.4 | 1.7-2.2 | 4.0-6.0 | 3.0-5.0 | - | - | Not more than 3.0 | 0.012 | 0.015 | Boron not more than 0.01 | - | - | + |
| 8-11 | KhN70VMTYu | EI617 | Not more than 0.12 | Not more than 0.6 | Not more than 0.5 | 13.0-16.0 | Bal. | 1.8-2.3 | 1.7-2.3 | 5.0-7.0 | 2.0-4.0 | - | 0.10-0.50 | Not more than 5.0 | 0.010 | 0.015 | Boron not more than 0.02; cerium not more than 0.02 | - | - | + |
| 8-12 | KhN67MVTYu | EP202 | Not more than 0.08 | Not more than 0.6 | Not more than 0.5 | 17.0-20.0 | Bal. | 2.2-2.8 | 1.0-1.5 | 4.0-5.0 | 4.0-5.0 | - | - | Not more than 4.0 | 0.010 | 0.015 | Boron not more than 0.01; cerium not more than 0.01 | - | - | + |
| 8-13 | KhN70MVTYuB | EI598 | Not more than 0.12 | Not more than 0.6 | Not more than 0.5 | 16.0-19.0 | Bal. | 1.9-2.8 | 1.0-1.7 | 2.0-3.5 | 4.0-6.0 | 0.5-1.3 | - | Not more than 5.0 | 0.010 | 0.015 | Boron not more than 0.01; cerium not more than 0.02 | - | - | + |
| 8-14 | KhN65MVTYu | EI893 | Not more than 0.05 | Not more than 0.6 | Not more than 0.5 | 15.0-17.0 | Bal. | 1.2-1.6 | 1.2-1.6 | 8.5-10.0 | 3.5-4.5 | - | - | Not more than 3.0 | 0.012 | 0.015 | Boron not more than 0.01; cerium not more than 0.025 | - | - | + |
| 8-15 | KhN56VMTYu | EP199 | Not more than 0.10 | Not more than 0.6 | Not more than 0.5 | 19.0-22.0 | Bal. | 1.1-1.6 | 2.1-2.6 | 9.0-11.0 | 4.0-6.0 | - | - | Not more than 4.0 | 0.015 | 0.015 | Boron not more than 0.008 | - | - | + |
| 8-16 | KhN70VMTYuF | EI826 | Not more than 0.12 | Not more than 0.6 | Not more than 0.5 | 13.0-16.0 | Bal. | 1.7-2.2 | 2.4-2.9 | 5.0-7.0 | 2.5-4.0 | - | 0.2-1.0 | Not more than 5.0 | 0.009 | 0.015 | Boron not more than 0.015; cerium not more than 0.020 | - | - | + |
| 8-17 | KhN57MTVYu | EP590 | Not more than 0.07 | Not more than 0.5 | Not more than 0.5 | 17.0-19.0 | Bal. | 2.2-2.8 | 1.0-1.5 | 1.5-2.5 | 8.5-10.0 | - | - | 8.0-10.0 | 0.010 | 0.015 | Boron not more than 0.005; cerium not more than 0.01 | - | - | + |
| 8-18 | KhN55MVYu | KhN55M6VYu, EP454 | Not more than 0.08 | Not more than 0.4 | Not more than 0.4 | 9.0-11.0 | Bal. | - | 4.2-5.0 | 4.5-5.5 | 5.0-6.5 | - | - | 17.0-20.0 | 0.010 | 0.015 | Boron not more than 0.01; cerium not more than 0.01 | - | - | + |
| 8-19 | KhN75VMYu | EI827 | Not more than 0.12 | Not more than 0.4 | Not more than 0.4 | 9.0-11.0 | Bal. | - | 4.0-4.6 | 4.5-5.5 | 5.0-6.5 | - | Not more than 0.70 | Not more than 5.0 | 0.010 | 0.015 | Boron 0.01-0.02; cerium not more than 0.01 | - | - | + |
| 8-20 | KhN62MVKYu | KhN62VMKYu, EI867 | Not more than 0.10 | Not more than 0.6 | Not more than 0.3 | 8.5-10.5 | Bal. | - | 4.2-4.9 | 4.3-6.0 | 9.0-11.5 | - | - | Not more than 4.0 | 0.011 | 0.015 | Cobalt 4.0-6.0; boron not more than 0.02; cerium not more than 0.02 | - | - | + |
| 8-21 | KhN56VMKYu | EP109 | Not more than 0.10 | Not more than 0.6 | Not more than 0.3 | 8.5-10.5 | Bal. | - | 5.4-6.2 | 6.0-7.5 | 6.5-8.0 | - | - | Not more than 1.5 | 0.010 | 0.015 | Cobalt 11.0-13.0; boron not more than 0.02; cerium not more than 0.02 | - | - | + |
| 8-22 | KhN55VMTKYu | EI929 | 0.04-0.10 | Not more than 0.5 | Not more than 0.5 | 9.0-12.0 | Bal. | 1.4-2.0 | 3.6-4.5 | 4.5-6.5 | 4.0-6.0 | - | 0.2-0.8 | Not more than 5.0 | 0.010 | 0.015 | Cobalt 12.0-16.0; boron not more than 0.02 | - | - | + |
| 8-23 | KhN77TYuRU | EI437BU | 0.04-0.08 | Not more than 0.6 | Not more than 0.4 | 19.0-22.0 | Bal. | 2.6-2.9 | 0.7-1.0 | - | - | - | - | Not more than 1.0 | 0.007 | 0.015 | Boron not more than 0.01; cerium not more than 0.02; lead not more than 0.001 | - | - | + |
| 8-24 | KhN58V | EP795 | Not more than 0.030 | Not more than 0.15 | Not more than 1.0 | 39.0-41.0 | Bal. | - | - | 0.5-1.5 | - | - | - | Not more than 0.8 | 0.012 | 0.015 | - | + | - | - |
| 8-25 | KhN65MVU | EP760 | Not more than 0.02 | Not more than 0.10 | Not more than 1.0 | 14.5-16.5 | Bal. | - | - | 3.0-4.5 | 15.0-17.0 | - | - | Not more than 0.5 | 0.012 | 0.015 | - | + | - | - |
Notes:
-
In the first column of the table, the digit preceding the hyphen indicates the sequence number of the steel class (1-6) or alloy type (7-8); the digits after the hyphen indicate the sequence numbers of the grades within each steel class or alloy type.
-
Chemical elements in steel grade designations are denoted by the following letters: A - nitrogen, V - tungsten, D - copper, M - molybdenum, R - boron, T - titanium, Yu - aluminium, Kh - chromium, B - niobium, G - manganese, E - selenium, N - nickel, S - silicon, F - vanadium, K - cobalt, Ts - zirconium, ch - rare-earth elements. The letter U in the designation of alloy grade KhN77TYuRU indicates a difference in chemical composition — in the mass fraction of carbon, titanium and aluminium — from alloy grade KhN77TYuR.
For alloy KhN65MVU, the letter U indicates a difference in the mass fraction of carbon, silicon and iron from alloy grade KhN65MV.
-
The designation of steel grades consists of element symbols followed by numerals. The numerals following the letters indicate the average content of the alloying element in whole units, except for elements present in the steel in small amounts. The numerals preceding the letter designation indicate the average or maximum (in the absence of a lower limit) carbon content of the steel in hundredths of a percent. The letter A (nitrogen) may not be placed at the end of a grade designation.
-
The designation of alloy grades consists solely of element letter symbols, except for nickel, which is followed by numerals indicating its average content in percent.
-
In documentation approved before this standard took effect, the previously established designations of steel and alloy grades may continue to be used. New documentation being developed must use the new designation. Where necessary, the former designation is given in parentheses.
-
The sign ”+” indicates that the steel is used for the given purpose; the sign ”++” indicates the preferred application where the steel has several applications.
-
Steels and alloys produced by special methods are additionally marked, after a hyphen at the end of the grade designation, with the letters: VD - vacuum arc remelting, Sh - electroslag remelting, and VI - vacuum induction melting, GR - gas-oxygen refining, VO - vacuum-oxygen refining, PD - plasma melting followed by vacuum arc remelting, ID - vacuum induction melting followed by vacuum arc remelting, ShD - electroslag remelting followed by vacuum arc remelting, PT - plasma melting, EL - electron-beam remelting, P - plasma arc remelting, ISh - vacuum induction melting followed by electroslag remelting, IL - vacuum induction melting followed by electron-beam remelting, IP - vacuum induction melting followed by plasma arc remelting, PSh - plasma melting followed by electroslag remelting, PL - plasma melting followed by electron-beam remelting, PP - plasma melting followed by plasma arc remelting, ShL - electroslag remelting followed by electron-beam remelting, ShP - electroslag remelting followed by plasma arc remelting, SSh - treatment with synthetic slag, and VP - vacuum-plasma remelting.
-
The amounts of boron, barium and cerium given in the table are calculated values and are not determined by chemical analysis (except in cases specifically stipulated in standards or technical specifications).
-
Alloy grade KhN35VTYu (EI787) is supplied with a sulfur content not exceeding 0.010% and a phosphorus content not exceeding 0.020% when used in place of nickel-base alloys.
-
Steel grade 55Kh20N4AG9 (EP303) may be supplied with a niobium content of 0.40-1.00%; in this case the steel is designated 55Kh20N4AG9B (EP303B).
-
Alloy grade KhN38VT (EI703) may be supplied with a niobium content of 1.2-1.7% in place of titanium; in this case the steel is designated KhN38VB (EI703B).
-
By agreement between the parties, steel grade 03Kh18N12-VI may contain titanium up to 0.008%.
-
By agreement between the parties, the chemical composition of steels and alloys may be refined.
-
By agreement between the parties, alloy grade EI893 is supplied with a carbon content not exceeding 0.06%.
-
For steel grade 12Kh18N10T rolled on semi-continuous and continuous mills, the titanium content must be [5(C-0.02)]-0.7%, and the ratio of chromium to nickel content must not exceed 1.8.
-
For alloy grade KhN77TYuRU (EI437BU), the permissible deviation for titanium is plus 0.05%.
For alloy grade KhN77TYuR, permissible deviations are plus 0.1% for titanium and plus 0.05% for aluminium.
-
In the “Titanium” column of Table 1, in the formula for determining titanium content, the letter C denotes the carbon content of the steel.
-
For alloy grade KhN55VMTKYu (EI929), the addition of cerium up to 0.02% by calculation is permitted.
-
In the chemical composition of alloy grade N70MFV, the mass fraction of carbon may be increased by plus 0.005% and silicon by plus 0.02%.
-
For steel grade 10Kh13G18D (DI-61), deviations are permitted of plus 0.5% for manganese content, plus 0.5% for chromium, and plus 0.2% for copper.
-
By agreement between the manufacturer and the consumer, the phosphorus mass fraction in steel grades 12Kh18N9, 17Kh18N9, 12Kh18N9T, 12Kh18N10T, 12Kh18N12T, 08Kh18N10T and 08Kh18N12T shall be set at not more than 0.040%.
The mass fraction of sulfur in steels produced by electroslag remelting shall not exceed 0.015%, except for steel grades 10Kh11N23T3MR (EP33), 03Kh16N15M3 (EI844), 03Kh16N15M3B (EI844B), for which the sulfur mass fraction shall not exceed the limits specified in Table 1 or established by agreement between the parties.
2.2. Deviations from the chemical composition limits specified in Table 1 are permitted in finished products.
Permissible deviations shall not exceed those specified in Table 2, unless other deviations, including for elements not listed in Table 2, are specified in standards or technical specifications for finished products.
Table 2
| Element name | Mass fraction of element in grade, % | Permissible deviations, % |
|---|---|---|
| Carbon | Up to 0.030 | +0.005 |
| Over 0.030 to 0.20 | ±0.01 | |
| Over 0.20 | ±0.02 | |
| Silicon | Up to 1.0 | +0.05 |
| Over 1.0 | ±0.10 | |
| Manganese | Up to 1.0 | +0.04 |
| Over 1.0 to 2.0 | ±0.05 | |
| Over 2.0 to 5.0 | ±0.06 | |
| Over 5.0 to 10.0 | ±0.08 | |
| Over 10.0 | ±0.15 | |
| Sulfur | Within the limits of Table 1 | +0.005 |
| Phosphorus | Within the limits of Table 1 | +0.005 |
| Nitrogen | Within the limits of Table 1 | ±0.02 |
| Aluminium | Up to 0.2 | ±0.02 |
| Over 0.2 to 1.0 | ±0.05 | |
| Over 1.0 to 5.0 | ±0.10 | |
| Over 5.0 | ±0.15 | |
| Titanium | Up to 1.0 | ±0.05 |
| Over 1.0 | ±0.10 | |
| Vanadium | Within the limits of Table 1 | ±0.02 |
| Niobium | Within the limits of Table 1 | ±0.02 |
| Molybdenum | Up to 1.75 | ±0.05 |
| Over 1.75 | ±0.10 | |
| Tungsten | Up to 0.2 | ±0.02 |
| Over 0.2 to 1.0 | ±0.04 | |
| Over 1.0 to 5.0 | ±0.05 | |
| Over 5.0 | ±0.10 | |
| Chromium | Up to 10.0 | ±0.10 |
| Over 10.0 to 15.0 | ±0.15 | |
| Over 15.0 | ±0.20 | |
| Nickel | Up to 1.0 | ±0.04 |
| Over 1.0 to 2.0 | ±0.05 | |
| Over 2.0 to 5.0 | ±0.07 | |
| Over 5.0 to 10.0 | ±0.10 | |
| Over 10.0 to 20.0 | ±0.15 | |
| Over 20.0 | ±0.35 | |
| Copper | Up to 1.0 | ±0.05 |
| Over 1.0 | ±0.10 |
Note. For steel grade 12Kh21N5T (N 5-4), permissible deviations are: titanium minus 0.05%, carbon plus 0.01%, aluminium plus 0.02%.
2.3. In steels and alloys not alloyed with titanium, titanium is permitted in an amount not exceeding 0.2%; in steel grades 03Kh18N11, 03Kh17N14M3 - not exceeding 0.05%; and in steel grades 12Kh18N9, 08Kh18N10, 17Kh18N9 - not exceeding 0.5%, unless a different titanium mass fraction is specified in standards or technical specifications for individual types of steel and alloys.
By agreement between the manufacturer and the consumer, the titanium mass fraction in steel grades 03Kh23N6, 03Kh22N6M2, 09Kh15N8Yu1, 07Kh16N6, 08Kh17N5M3 shall not exceed 0.05%.
2.4. In steels not alloyed with copper, the residual copper mass fraction is limited to not more than 0.30%.
By agreement between the manufacturer and the consumer, the presence of residual copper not exceeding 0.40% is permitted in steel grades 08Kh18N10T, 08Kh18N12T, 12Kh18N9T, 12Kh18N10T, 12Kh18N12T, 12Kh18N9, 17Kh18N9.
For steel grade 10Kh14AG15, the residual copper mass fraction shall not exceed 0.6%.
2.5. In chromium steels with a chromium mass fraction up to 20%, not alloyed with nickel, residual nickel up to 0.6% is permitted; with a chromium mass fraction over 20% - up to 1%; and in chromium-manganese austenitic steels - up to 2%.
2.6. In chromium-nickel and chromium steels not alloyed with tungsten and vanadium, the presence of residual tungsten and vanadium is permitted not exceeding 0.2% each. In steel grades 05Kh18N910T, 08Kh18N10T, 17Kh18N9, 12Kh18N9, 12Kh18N9T, 12Kh18N10T, 12Kh18N12T, the residual molybdenum mass fraction shall not exceed 0.5%; for enterprises of the aviation industry, in steel grades 05Kh18N10T, 08Kh18N10T, 12Kh18N9, 12Kh18N9T, 12Kh18N10T, 12Kh18N12T, the residual molybdenum mass fraction shall not exceed 0.3%. In other steels not alloyed with molybdenum, the residual molybdenum mass fraction shall not exceed 0.3%.
At the consumer’s request, steel grades 05Kh18N10T, 08Kh18N10T, 12Kh18N9, 17Kh18N9, 12Kh18N9T, 12Kh18N10T, 12Kh18N12T are manufactured with residual molybdenum not exceeding 0.3%, and steel grades 05Kh18N10T, 03Kh18N11, 03Kh23N6, 08Kh18N12B, 08Kh18N12T, 08Kh18N10T - not exceeding 0.1%.
2.6.1. In alloys on a nickel or iron-nickel base, not alloyed with titanium, aluminium, niobium, vanadium, molybdenum, tungsten, cobalt, or copper, the mass fraction of the listed residual elements shall not exceed the limits specified in Table 3.
Table 3
| Element name | Maximum permissible mass fraction of residual elements in alloys, % | |
|---|---|---|
| nickel-base | iron-nickel-base | |
| Titanium | 0.2 | 0.2 |
| Aluminium | 0.2 | 0.1 |
| Niobium | 0.2 | 0.1 |
| Vanadium | 0.2 | 0.1 |
| Molybdenum | 0.2 | 0.2 |
| Tungsten | 0.2 | 0.2 |
| Cobalt | 0.5 | 0.5 |
| Copper | 0.07 | 0.25 |
Note. In alloy grade KhN35VTYu, the residual copper mass fraction shall not exceed 0.15%.
2.7. In steels and alloys alloyed with tungsten, a residual molybdenum mass fraction up to 0.3% is permitted. By agreement between the parties, a higher molybdenum mass fraction is permitted provided the tungsten content is reduced accordingly, based on replacing tungsten with molybdenum at a ratio of 2:1. In alloy KhN60VT (EI868), a residual molybdenum mass fraction not exceeding 1.5% is permitted. In alloy KhN38VT, a residual molybdenum mass fraction not exceeding 0.8% is permitted.
2.8. Other values of the residual element mass fraction are permitted by agreement between the manufacturer and the consumer.
Determination of the residual element mass fraction may be omitted unless otherwise specified in the order.
2.9. For steel grade 15Kh28 (Kh28) used for welding to glass, the silicon content shall not exceed 0.4%.
2.10. At the customer’s request, steels and alloys are manufactured:
as alloy grade KhN77TYuR (EI437B) with a boron content not exceeding 0.003%; in this case the alloy is designated KhN77TYu (EI437A); as alloy grades KhN75MBTYu (EI602), KhN78T (EI435) and KhN77TYuR (EI437B) with a reduced iron content against the limits specified in Table 1, as specified in standards or technical specifications for individual types of products;
with narrower limits of the chemical composition established by this standard, as specified in standards or technical specifications for individual types of products;
with a restricted lower limit of manganese content for grades in which manganese is specified only by an upper limit;
with control of the content of harmful non-ferrous metal impurities: lead, tin, antimony, bismuth and arsenic - in heat-resistant nickel-base alloys. Control methods and limits are established by agreement between the parties;
with determination of the content of residual elements (titanium, copper, molybdenum, tungsten, vanadium and nickel).
2.11. Recommendations for the application of steels and alloys are given in the appendix.
2.12. The chemical composition of steels and alloys is determined according to GOST 12344 - GOST 12365, GOST 28473, GOST 17051, GOST 24018.0 - GOST 24018.6, GOST 17745, or by other methods ensuring the required accuracy of determination. Sampling for determination of chemical composition is carried out according to GOST 7565.
Appendix (recommended). Recommendations for the application of steels and alloys
Table 1
Typical application of corrosion-resistant steel and alloy grades of Group I
| Grade No. | Grade of steels and alloys | Purpose | Note | |
|---|---|---|---|---|
| New designation | Old designation | |||
| 1-12 3-2 2-4 | 20×13 08×13 12×13 | 2×13 0×13 1×13 | Parts with increased ductility subject to impact loads (hydraulic press valves, household items), as well as products exposed to mildly aggressive media (atmospheric precipitation, aqueous solutions of organic acid salts at room temperature, etc.) | Maximum corrosion resistance is achieved after heat treatment (quenching with tempering) and polishing. Steel grade 08Kh13 can also be used after annealing |
| 1-17 | 25×13N2 | 2×14N2, EI474 | Same | Has better machinability |
| 1-13 1-14 | 30×13 40×13 | 3×13 4×13 | Cutting, measuring and surgical instruments, springs, carburetor needles, household items, compressor valve plates | The steel is used after quenching and low tempering, with a ground and polished surface; it has increased hardness |
| 2-5 | 14×17N2 | 1×17N2, EI268 | Used as a steel with sufficiently satisfactory processing properties in the chemical, aviation and other industries | Has the highest corrosion resistance after quenching with high tempering |
| 1-19 | 95×18 | 9×18, EI229 | High-hardness ball bearings for oil equipment, top-quality knives, bushings and other parts subject to severe wear | The steel is used after quenching with low tempering |
| 3-3 | 12×17 | Kh17 | Household items and kitchen utensils, equipment for food and light industry plants. The steel is not recommended for welded structures | Used in the annealed condition |
| 3-4 | 08×17T | 0×17T, EI645 | Recommended as a substitute for steel grade 12Kh18N10T for structures not subject to impact loads and at operating temperatures not below -20 °C. Used for the same purposes as steel grade 12Kh17, including for welded structures | Used as a substitute for steel grades 12Kh18N9T and 12Kh18N10T |
| 3-8 | 08×18T1 | 0×18T1 | Same as for grades 12Kh17 and 08Kh17T, mainly for stamped products | Same |
| 3-9 | 08×18Tch | DI-77 | Recommended as a substitute for steel grade 12Kh18N10T for manufacturing household items and kitchen utensils, food and light industry equipment, and other products at operating temperatures down to -20 °C | Has somewhat increased ductility and polishability compared to steel 08Kh18T1 |
| 3-6 | 15×25T | Kh25T, EI439 | Recommended as a substitute for steel grade 12Kh18N10T for welded structures not subject to impact loads at operating temperatures not below -20 °C, for use in more aggressive media compared to those for which steel grade 08Kh17T is recommended. Pipes for heat-exchange equipment operating in aggressive media | Not recommended for use in the temperature range 400-700 °C |
| 3-7 | 15×28 | Kh28, EI349 | The same, and also for seals with glass | Welded joints are prone to intergranular corrosion |
| 4-1 | 20×13N4G9 | 2×13N4G9, EI100 | Substitute for cold-rolled steel grades 12Kh18N9 and 17Kh18N9 for strong and lightweight structures joined by spot electric welding | Resists atmospheric corrosion well. Welded joints made by other methods are subject to intergranular corrosion |
| 6-7 | 10×14AG15 | Kh14AG15, DI-13 | Same as above, and for household items and washing machines | - |
| 6-5 | 10Kh14G14N3 | Kh14G14N3, DI-6 | Same | - |
| 4-2 | 09Kh15N8Yu | Kh15N9Yu, EI904 | Recommended as a high-strength steel for products operating in atmospheric conditions, acetic acid and other saline environments, and for elastic elements | Increased strength is achieved by tempering at temperatures of 750° and 850°C |
| 4-3 | 07Kh16N6 | Kh16N6, EP288 | Same as above. Contains no delta ferrite | - |
| 4-6 | 08×17N5M3 | Kh17N5M3, EI925 | Same as steel 08Kh15N8Yu, and for sulfuric acid environments | The steel welds well |
| 4-7 | 08×17N6T | DI-21 | Used for hydrofoil devices, rudders, brackets, and ship shafts operating in seawater. Recommended as a substitute for steel grades 09Kh17N7Yu and 09Kh17N7Yu1 | Has higher resistance to intergranular corrosion than steel grades 09Kh17N7Yu and 09Kh17N7Yu1 |
| 5-7 | 08×18G8N2T | KO-3 | Recommended as a substitute for steel grades 12Kh18N10T and 08Kh18N10T for manufacturing welded equipment operating in aggressive environments in the chemical, food, and other industries | Has higher strength compared to steel 12Kh18N10T and 08Kh18N10T |
| 1-18 | 20×17N2 | 2×17N2 | Recommended as a high-strength steel for heavily loaded parts subject to abrasion and impact in mildly aggressive environments | Has high hardness (above HRC 45) |
| 5-3 | 08×22N6T | 0×22N5T, EP53 | Recommended as a substitute for steel grades 12Kh18N10T and 08Kh18N10T for manufacturing welded equipment in the chemical, food, and other industries operating at temperatures up to 300°C | Has higher strength compared to steel 12Kh18N10T and 08Kh18N10T |
| 5-4 | 12×21N5T | 1×21N5T, EI811 | Used for welded and brazed structures operating in aggressive environments | The steel has higher strength compared to steel 08Kh22N6T and better brazeability compared to steel 08Kh18N10T |
| 5-5 | 08Kh21N6M2T | 0×21N6M2T, EP54 | Recommended as a substitute for grade 10Kh17N13M2T for manufacturing parts and welded structures operating in highly aggressive environments: acetic acid, sulfuric acid, and phosphoric acid environments | Has higher strength compared to steel 10Kh17N13M2T |
| 6-6 | 10×14G14N4T | Kh14G14N3T, EI711 | Recommended as a substitute for steel grade 12Kh18N10T for manufacturing equipment operating in mildly aggressive environments, as well as at temperatures down to -196°C | Has satisfactory resistance to intergranular corrosion |
| 6-19 | 12×17G9AN4 | Kh17G9AN4, EI878 | For products operating in atmospheric conditions. Recommended as a substitute for steel grades 12Kh18N9 and 12Kh18N10T | - |
| 6-18 | 15Kh17AG14 | Kh17AG14, EP213 | Recommended as a substitute for steel grade 12Kh18N9 for products operating in mildly aggressive environments. Resists atmospheric corrosion well | - |
| 6-22 6-23 | 10Kh17N13M2T 10Kh17N13M3T | Kh17N13M2T, EI448 Kh17N13M3T, EI432 | Recommended for manufacturing welded structures operating under conditions of boiling phosphoric acid, sulfuric acid, 10% acetic acid, and sulfuric acid environments | - |
| 6-24 | 08×17N15M3T | 0×17N16M3T, EI580 | Used for the same purposes as steel grade 10Kh17N13M2T | Contains practically no ferrite phase. Has higher resistance to pitting corrosion than steel grade 10Kh17N13M2T in environments containing chloride ions |
| 6-20 | 03×17N14M3 | 000×17N13M2 | Used for the same purposes as steel grades 08Kh17N15M3T and 10Kh17N13M2T | Has higher resistance to intergranular and knife-line corrosion than steel grades 08Kh17N15M3T and 10Kh17N13M2T |
| 6-15 6-16 | 03Kh16N15M3 03Kh16N15M3B | 00Kh16N15M3, EI844 00Kh16N15M3B, EI844B | Used for the same purposes as steel grades 08Kh17N15M3T and 10Kh17N13M2T | Has higher resistance to pitting corrosion than steel 03Kh17N14M3 |
| 5-8 | 15×18N12S4TYu | EI654 | Recommended for welded products operating in air and aggressive environments, in particular for concentrated nitric acid | Not prone to cracking and stress corrosion |
| 6-1 | 08×10N20T2 | 0×10N20T2 | Recommended as a non-magnetic steel for manufacturing large-size parts operating in seawater | - |
| 6-28 | 04×18N10 | 00×18N10, EI842, EP550 | Used for the same purposes as steel grade 08Kh18N10T, and for operation in nitric acid and nitrate environments at elevated temperatures | Has higher resistance to intergranular corrosion |
| 6-33 | 03×18N11 | 000Kh18N11 | Same | Same as above, and with increased resistance to knife-line corrosion compared to steel 12Kh18N12B |
| 6-35 | 03×18N12 | 000×18N12 | Same as above, and in the electronics industry | Contains practically no ferrite phase |
| 6-25 6-29 | 12Kh18N9 08Kh18N10 | Kh18N9 0Kh18N10 | Used in the form of cold-rolled sheet and strip of increased strength for various parts and structures joined by spot welding, as well as for products subjected to heat treatment (quenching) | Welded joints made by methods other than spot welding are prone to intergranular corrosion |
| 6-26 | 17×18N9 | 2×18N9 | Used for the same purposes as steel grade 12Kh18N9 | A steel of higher strength than steel grade 12Kh18N9 |
| 6-32 | 12×18N10E | Kh18N10E, EP47 | Same | Has the same corrosion resistance as steel grade 12Kh18N9, but has better machinability |
| 6-30 | 08Kh18N10T | 0Kh18N10T, EI914 | Recommended for manufacturing welded products operating in environments more aggressive than steel grades 12Kh18N10T and 12Kh18N12T | The steel has increased resistance to intergranular corrosion compared to steel 12Kh18N10T and 12Kh18N12T |
| 6-31 6-27 | 12Kh18N10T 12Kh18N9T | Kh18N10T Kh18N9T | Used for manufacturing welded equipment in various industries. Steel grade 12Kh18N9T is recommended for use in the form of bar stock and hot-rolled sheet not produced on continuous rolling mills | - |
| 6-34 | 06×18N11 | 0×18N11, EI684 | Used for the same purposes as steel grade 08Kh18N10, with strict limitation of ferrite phase content | Ferrite phase content is lower than in steel grade 08Kh18N10 |
| 6-36 | 08×18N12T | 0×18N12T | Used for the same purposes as steel grade 08Kh18N10, with strict limitation of ferrite phase content | The steel contains practically no ferrite phase and has higher resistance to intergranular corrosion |
| 6-37 | 12×18N12T | Kh18N12T | Used for the same purposes as steel grade 08Kh18N10, with strict limitation of ferrite phase content | Contains a smaller amount of ferrite phase than steel grade 12Kh18N10T |
| 6-38 | 08×18N12B | 0×18N12B, EI402 | Used for the same purposes as steel grade 12Kh18N12T | Has increased resistance to pitting corrosion and higher resistance than steel 12Kh18N10T in nitric acid |
| 6-50 | 10Kh13G18D | DI-61 | Recommended as a substitute for steel grades 12Kh18N10T and 08Kh18N10 for manufacturing welded products for household appliances, railcar building, consumer goods, machines and equipment for the food and retail equipment industry, and plate heat exchangers | Has high ductility in deep drawing |
| 7-6 | 06KhN28MDT | 0×23N28M3D3T, EI943 | For welded structures operating at temperatures up to 80°C in sulfuric acid of various concentrations, except 55% acetic and phosphoric acids, in acidic and sulfuric acid environments | - |
| 7-7 | 03KhN28MDT | 000×23N28M3D3T, EP516 | Same | Has increased resistance to intergranular and knife-line corrosion |
| 7-8 | 06KhN28MT | 0×23N28M2T, EI628 | Recommended for manufacturing welded structures and assemblies operating in environments less aggressive than for steel grade 06KhN28MDT. In particular, in low-concentration sulfuric acid up to 20% at temperatures not exceeding 60°C, as well as under conditions of hot phosphoric acid | Has satisfactory resistance to intergranular corrosion |
| 1-20 | 09×16N4B | 1Kh16N4B, EP56 | Used for manufacturing high-strength stamp-welded structures and parts operating in contact with aggressive environments | Has the highest corrosion resistance after quenching with low tempering (up to 400°C) |
| 6-21 | 08×17N13M2T | 0Kh17N13M2T | Used for the same purposes as steel grade 10Kh17N13M2T | Has higher resistance to general and intergranular corrosion than steel grade 10Kh17N13M2T |
| 4-4 | 09×17N7Yu | 0×17N7Yu | Used for foil devices, rudders, and brackets operating in seawater | Has the highest corrosion resistance after double first tempering at 740-760 °C |
| 4-5 | 09×17N7Yu1 | 0×17N7Yu1 | Used for ship shafts operating in seawater | Same |
| 6-42 | 07×21G7AN5 | Kh21G7AN5, EP222 | For welded products operating at cryogenic temperatures down to -253 °C and in moderately aggressive environments | - |
| 6-43 | 03×21N21M4GB | 00×20N20M4B, ZI35 | Recommended for manufacturing welded structures and assemblies operating under conditions of hot phosphoric acid with fluoride and sulfur compound impurities, sulfuric acid at low concentrations and temperatures not exceeding 80 °C, and nitric acid at high temperature (up to 95 °C) | The steel welds well |
| 8-2 | KhN65MV | EP567 | Used for manufacturing welded structures operating at elevated temperatures in sulfuric and hydrochloric acid environments of an oxidizing nature, in concentrated acetic acid, and other highly aggressive environments | - |
| 8-1 | N70MFV | EP814A | Used for manufacturing welded structures operating at high temperatures in hydrochloric, sulfuric, phosphoric acid and other reducing environments | The alloy is resistant to intergranular corrosion in aggressive reducing environments |
| 8-24 | KhN58V | EP795 | Used for manufacturing welded structures operating in nitric acid solutions in the presence of fluoride ions | The alloy is resistant to intergranular corrosion in nitric-fluoride solutions |
| 8-25 | KhN65MVU | EP760 | Used for manufacturing welded structures operating at elevated temperatures in aggressive oxidizing-reducing environments (sulfuric acid, acetic acid, wet chlorine, chlorides, etc.) | The alloy is resistant to intergranular corrosion in aggressive environments |
| 1-22 | 07×16N4B | - | Intended for manufacturing highly loaded parts for shipbuilding products, welded assemblies, nuclear power facilities, and the chemical industry | - |
| 1-23 | 65×13 | - | Intended for manufacturing safety razor blades and kitchen knives | - |
| 5-9 | 03×23N6 | - | Intended for manufacturing equipment in chemical engineering | Has higher strength compared to steel grades 08Kh18N10T and 05Kh18N11 |
| 5-10 | 03×22N6M2 | - | Same | Has higher strength compared to steel grades 10Kh17N13M2T and 03Kh17N14M3 |
| 6-51 | 03×18N10T | 00×18N10T | Used for manufacturing bellows expansion joints | Has a higher deep-drawing capacity than steel grades 08Kh18N10T and 12Kh18N10T |
| 6-52 | 05×18N10T | 0×18N10T | Same |
Table 2
Typical application of heat-resistant steels and alloys of Group II
| Grade No. | Steel and alloy grades | Purpose | Recommended maximum service temperature for long-term use (up to 10,000 h) | Temperature of onset of intensive scaling in air, °C | Note | |
|---|---|---|---|---|---|---|
| New designation | Old designation | |||||
| 1-5 | 40×9S2 | 4×9S2 | Exhaust valves of automotive, tractor, and diesel engines, recuperator tubes, heat exchangers, grate bars | - | 850 | Resistant in sulfur-containing environments |
| 1-6 | 40×10S2M | 4×10S2M, EI107 | Engine valves | - | 850 | Same |
| 1-15 | 30×13N7S2 | 3×13N7S2, EI72 | Automotive engine valves | - | 950 | ” |
| 2-1 | 15Kh6SYu | Kh6SYu, EI428 | Boiler plant parts, tubes | - | 800 | ” |
| 2-4 | 12×13 | 1×13 | Turbine parts, tubes, boiler parts | - | 700 | - |
| 3-1 | 10×13SYu | 1×12SYu, EI404 | Automotive and tractor engine valves, various parts | - | 950 | Resistant in sulfur-containing environments |
| 3-3 | 12×17 | Kh17 | Heat exchangers, kitchen equipment, etc., tubes | - | 900 | - |
| 3-4 | 08×17T | 0×17T, EI645 | Same | - | 900 | - |
| 3-8 | 08×18T1 | 0×18T1 | ” | - | 900 | - |
| 3-5 | 15×18SYu | Kh18SYu, EI484 | Pyrolysis plant tubes, equipment, parts | - | 1050 | Resistant in sulfur-containing environments |
| 3-6 | 15×25T | Kh25T, EI439 | Equipment, parts, thermocouple sheaths, spark plug electrodes, pyrolysis plant tubes, heat exchangers | - | 1050 | - |
| 3-7 | 15×28 | Kh28, EI349 | Equipment, parts, pyrolysis plant tubes, heat exchangers | - | 1100-1150 | - |
| 5-1 | 08×20N14S2 | 0×20N14S2, EI732 | Pipes | - | 1000-1050 | Resistant in carburizing environments |
| 5-2 | 20×20N14S2 | Kh20N14S2, EI211 | Furnace conveyors, carburizing boxes | - | 1000-1050 | Same |
| 5-6 | 20×23N13 | Kh23N13, EI319 | Methane pyrolysis tubes, pyrometric tubes | 1000 | 1050 | In the range of 600-800 °C it is prone to embrittlement due to the formation of the -phase |
| 6-9 | 09Kh14N16B | EI694 | Superheater tubes and piping for ultra-high pressure units | 650 | 850 | - |
| 6-29 6-25 | 08Kh18N10 12Kh18N9 | 0Kh18N10Kh18N9 | Tubes, furnace fittings, heat exchangers, muffles, retorts, exhaust system pipes and manifolds, spark plug electrodes | 800 | 850 | Not resistant in sulfur-containing environments. Used in cases where nickel-free steels cannot be applied |
| 6-30 | 08Kh18N10T | 0Kh18N10T, EI914 | Same | 800 | 850 | Same |
| 6-31 | 12Kh18N10T | Kh18N10T | ” | 800 | 850 | ” |
| 6-27 | 12Kh18N9T | Kh18N9T | ” | 800 | 850 | ” |
| 6-37 | 12×18N12T | Kh18N12T | Pipes | 800 | 850 | - |
| 6-40 | 36×18N25S2 | 4×18N25S2 | Furnace conveyors and other loaded parts | 1000 | 1100 | Resistant in carburizing environments |
| 6-45 6-46 | 10Kh23N18 20Kh23N18 | 0Kh23N18Kh23N18, EI417 | Tubes and parts for methane conversion and pyrolysis units, sheet parts | 1000 | 1050 | In the range of 600-800 °C they are prone to embrittlement due to the formation of the -phase |
| 6-48 | 12×25N16G7AR | Kh25N16G7AR, EI835 | Parts of gas pipeline systems made from thin sheets, strip, and section rolled products | 1050 | 1100 | Recommended as a replacement for nickel-based heat-resistant alloys |
| 6-41 | 55×20G9AN4 | EP303 | Automotive engine valves | - | 950 | - |
| 6-44 | 45×22N4M3 | EP48 | Same | - | 950 | - |
| 6-47 | 20×25N20S2 | Kh25N20S2, EI283 | Hangers and supports in boilers, tubes for electrolysis and pyrolysis units | 1050 | 1100 | In the range of 600-800 °C it is prone to embrittlement due to the formation of the -phase |
| 7-4 | KhN38VT | EI703 | Gas system parts | 1000 | 1050 | Recommended as a replacement for heat-resistant alloy grade KhN78T |
| 7-5 | KhN28VMAB | EP126 | Sheet parts of turbines | Up to 1000 h, 800-1000 | 1100 | - |
| 7-9 | KhN45Yu | EP747 | Burner device parts, thermocouple sheaths, sheet and tubular furnace parts (e.g., expanded perlite production, ceramic tile firing) | 1250-1300 | - | Recommended as a replacement for alloy grade KhN78T |
| 8-4 | KhN60Yu | EI559A | Gas pipeline system parts, equipment | 1200 | Over 1250 | - |
| 8-7 | KhN75MBTYu | EI602 | Same | 1050 | 1100 | - |
| 8-6 | KhN78T | EI435 | Gas pipeline system parts, section parts, tubes | 1100 | 1150 | Not resistant in sulfur-containing environments |
| 8-3 | KhN60VT | EI868 | Sheet engine parts | 1000 | 1100 | - |
| 8-5 | KhN70Yu | EI652 | Gas pipeline system parts | 1200 | Over 1250 | Not resistant in sulfur-containing environments |
Note. The temperature of onset of intensive scaling in air is given as approximate.
Table 3
Typical application of creep-resistant steels and alloys of Group III
| Grade No. | Steel and alloy grades | Purpose | Recommended service temperature, °C | Service life | Temperature of onset of intensive scaling, °C | Note | |
|---|---|---|---|---|---|---|---|
| New designation | Old designation | ||||||
| 1-2 1-3 | 15Kh5M 15Kh5VF | Kh5M Kh5VF | For housings and internal elements of equipment at oil refineries and cracking pipes, pump parts, valves, fasteners | 600 | Very long-term | 650 | - |
| 1-4 | 12×8VF | 1×8VF | Pipes for furnaces, equipment and piping systems of oil refineries | 500 | Long-term | 650 | - |
| 1-5 | 40×9S2 | 4×9S2 | Engine valves, fasteners | 650 | Same | 850 | - |
| 1-6 | 40×10S2M | 4×10S2M, EI107 | Same | 650 | Same | 850 | - |
| 1-10 | 11×11N2V2MF | Kh12N2VMF, EI962 | Compressor discs, blades and other loaded parts | 600 | Long-term | 750 | - |
| 1-21 | 13×11N2-V2MF | 1×12N2-VMF, EI961 | Same | 600 | ” | 750 | - |
| 1-11 | 16×11N2V2MF | 2×12N2VMF, EI962A | ” | 600 500 | ” Very long-term | 750 750 | - - |
| 1-12 | 20×13 | 2×13 | Steam turbine blades, valves, bolts and pipes | 500 | Same | 750 | - |
| 2-4 | 12×13 | 1×13 | Same | 550 | ” | 700 | - |
| 1-16 | 13×14N3V2FR | Kh14NVFR, EI736 | Heavily loaded parts, including discs, shafts, tie bolts, blades and other parts operating under high humidity conditions | 550 | ” | 750 | - |
| 1-7 | 15×11MF | 1×11MF | Rotor and guide blades of steam turbines | 580 | ” | 750 | - |
| 2-2 | 15×12VNMF | 1×12VNMF, EI802 | Rotors, discs, blades, bolts | 780 | Long-term | 950 | - |
| 6-44 | 45×22N4M3 | EP48 | Engine valves | 850 | Same | 950 | - |
| 6-41 | 55×20G9AN4 | EP303 | Same | 600 | Very long-term | 750 | - |
| 2-3 | 18×12VMBFR | 2×12VMBFR, EI993 | Forgings, turbine blades, fasteners | 500 | Same | 750 | - |
| 3-2 | 08×13 | 0×13, EI496 | Steam turbine blades, valves, bolts and pipes | 650 | Limited | 750 | - |
| 6-4 | 37×12N8G8MFB | 4×12N8G8MFB, EI481 | Turbine discs | 630 | Long-term | 750 | - |
| 6-2 | 10×11N20T3R | Kh12N20T3R, EI696 | Turbine parts (forgings, bar stock, sheet) | 700 | Limited | 850 | - |
| 6-49 | 10×11N20-T2R | Kh12N20-T2R, EI696A | Same | 700 | Same | 850 | - |
| 6-3 | 10Kh11N23T3MR | Kh12N22T3MR, EP33 | Springs and fastener parts | 700 | ” | 850 | - |
| 1-20 | 09×16N4B | 1Kh16N4B, EP56 | Superheater pipes and piping for ultra-high pressure units, sheet stock | 650 | Very long-term | 850 | - |
| 6-10 | 09×14N19V2BR | 1×14N18V2BR, EI695R | Same | 700 | Same | 850 | - |
| 1-8 | 18×11MNFB | 2×11MFBN, EP291 | Heavily loaded parts, steam turbine blades, valve parts, forgings for discs, rotors of steam and gas turbines | 600 | ” | 750 | - |
| 1-9 | 20×12VNMF | 2×12VNMF, EP428 | Same | 600 | ” | 750 | - |
| 6-9 | 09Kh14N16B | 1×14N16B, EI694 | Superheater pipes and piping for ultra-high pressure units, sheet stock | 650 | ” | 850 | - |
| 6-11 | 09×14N19V2BR1 | 1×14N18V2BR1, EI726 | Turbine rotors, discs and blades | 700 | ” | 850 | - |
| 6-8 | 45×14N14V2M | 4×14N14V2M, EI69 | Engine valves, forgings, piping parts | 650 | Long-term | 850 | - |
| 2-5 | 14×17N2 | 1×17N2, EI268 | Rotor blades, discs, shafts, bushings | 400 | Same | 800 | - |
| 6-12 | 40×15N7G7F2MS | 4×15N7G7F2MS, EI388 | Gas turbine blades, fasteners | 650 | Limited | 800 | - |
| 6-14 | 08×15N24V4TR | EP164 | Rotor and guide blades, fasteners, discs of gas turbines | 700 | Very long-term | 900 | - |
| 6-13 | 08×16N13M2B | 1×16N13M2B, EI680 | Forgings for discs and rotors, blades, bolts | 600 | Same | 850 | - |
| 6-17 | 09×16N15M3B | Kh16N15M3B, EI847 | Superheater pipes and high-pressure piping | 350 | ” | 850 | - |
| 6-31 | 12Kh18N10T | Kh18N10T | Exhaust system parts, pipes, sheet and bar parts | 600 | ” | 850 | - |
| 6-37 | 12×18N12T | Kh18N12T | Same | 600 | ” | 850 | More stable in service compared to 12×18N10T |
| 6-27 | 12Kh18N9T | Kh18N9T | ” | 600 | ” | 850 | - |
| 6-39 | 31×19N9MVBT | EI572 | Rotors, discs, bolts | 600 | ” | 800 | - |
| 6-45 | 10×23N18 | 0×23N18 | Pipes, fittings (under reduced loads) | 1000 | Long-term | 1050 | In the 600-800 °C range, it is prone to embrittlement due to the formation of σ-phase |
| 6-46 | 20×23N18 | Kh23N18, EI417 | Parts of equipment in the chemical and oil industries, gas pipelines, combustion chambers (can be used for resistance heating elements) | 1000 | Same | 1050 | Same |
| 6-48 | 12×25N16G7AR | Kh25N16G7AR, EI835 | Sheet and bar parts operating under moderate stresses | 950 | Limited | 1050- 1100 | Replaces alloys KhN75MBTYu (EI602) and KhN78T (EI435) |
| 7-1 | KhN35VT | EI612 | Gas turbine blades, discs, rotors, fasteners | 650 | Very long-term | 850- 900 | - |
| 7-2 | KhN35VTYu | EI787 | Discs and blades of turbines and compressors | 750 | Limited | 900 | Can replace alloys EI437A and EI437B |
| 7-4 | KhN38VT | EI703 | Sheet parts operating under moderate stresses | 950 | Same | 1050 | Replaces alloy KhN78T |
| 8-4 | KhN60Yu | EI559A | Turbine sheet parts operating under moderate stresses (can be used for resistance heating elements) | 1100 | ” | 1200 | - |
| 8-10 | KhN70VMYuT | EI765 | Blades, fasteners | 750 | Very long-term | 1000 | - |
| 8-11 | KhN70VMTYu | EI617 | Turbine blades | 800 | Long-term | 1000 | - |
| 7-3 | KhN32T | EP670 | Gas exhaust pipes, sheet parts of high-temperature petrochemical units | 850 850 | Same, very long-term | 1000 1000 | - - |
| 8-8 | KhN80TBYu | EI607 | Turbine blades, fasteners | 700 | Same | 1050 | - |
| 8-13 | KhN70MVTYuB | EI598 | Turbine blades | 850 | Limited | 1000 | - |
| 8-5 | KhN70Yu | EI652 | Sheet parts, gas pipelines operating under moderate stresses (can be used for resistance heating elements) | 1100 | Same | 1200 | - |
| 8-6 | KhN78T | EI435 | Flame tubes | 1000 | ” | 1100 | - |
| 8-12 | KhN67MVTYu | EI202 | Blades, housings, discs, sheet parts of turbines | 800 850 | Long-term Limited | 1000 1000 | - - |
| 8-7 | KhN75MBTYu | EI602 | Sheet parts of turbines | 950 | Same | 1050 | - |
| 8-9 | KhN77TYuR | EI437B | Turbine discs, blades | 750 | ” | 1050 | - |
| 8-3 | KhN60VT | EI868 | Sheet parts of turbines | 1000 | ” | 1100 | - |
| 8-17 | KhN57MTVYu | EP590 | Blades, housings and other turbine parts | 850 900 | Short-term Same | 1000 1080 | - - |
| 8-18 | KhN55MVYu | EP454 | Turbine blades, discs | 900 | Limited | 1080 | - |
| 8-20 | KhN62MVKYu | EI867 | Same | 800 | Long-term | 1080 | - |
| 800 | Very long-term | 1000 | - | ||||
| 8-14 | KhN65VMTYu | EI893 | Rotor and guide blades, fasteners of gas turbines | 800 | Limited | 1050 | - |
| 8-15 | KhN56VMTYu | EP199 | Heavily loaded parts, fittings, flanges, sheet parts | 850 | Long-term | 1050 | - |
| 8-16 | KhN70VMTYuF | EI826 | Turbine blades | 850 | Limited | 1080 | - |
| 8-19 | KhN75VMYu | EI827 | Same | 800 | Long-term | 1080 | - |
| 8-21 | KhN56VMKYu | EP109 | ” | 950 | Limited | 1050 | - |
| 8-22 | KhN55VMTKYu | EI929 | ” | 950 | Same | 1050 | - |
| 8-23 | KhN77TYuRU | EI437BU | Turbine discs, blades | 750 | ” | 1050 | Produced as metal products of larger cross-sections than alloy EI437B |
Notes:
-
Short-term service life is conventionally understood as a part’s service time of up to 100 h, limited service life as 100 to 1000 h, long-term service life as 1000 to 10,000 h (in individual cases up to 20,000 h), and very long-term service life as significantly more than 10,000 h (usually 50,000 to 100,000 h).
-
The recommended operating temperature, service life, and temperature of onset of intensive scale formation are given as approximate values.
Estimate for the “GOST 5632-72” category
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