GOST EN 28839-2015 Mechanical Properties of Fasteners. Bolts, Screws, Studs and Nuts Made of Non-Ferrous Metals

GOST EN 28839-2015

Group G30

INTERSTATE STANDARD

Mechanical properties of fasteners

BOLTS, SCREWS, STUDS AND NUTS MADE OF NON-FERROUS METALS

Mechanical properties of fasteners. Bolts, screws, studs and nuts made of non-ferrous metals

ICS 21.060.10

ICS 21.060.20

Effective date 2018-01-01

Foreword

The objectives, basic principles and general procedure for interstate standardization work are established by GOST 1.0-92 “Interstate System of Standardization. Basic Provisions” and GOST 1.2-2009 “Interstate System of Standardization. Interstate Standards, Rules and Recommendations for Interstate Standardization. Rules for Development, Adoption, Application, Updating and Cancellation”

Information about the standard

1 PREPARED by the Federal State Unitary Enterprise “All-Russian Scientific Research Institute for Standardization and Certification in Mechanical Engineering” (VNIINMASH) and “RM-Center” Limited Liability Company (RM-Center LLC) based on its own Russian translation of the English-language version of the standard specified in item 5

2 SUBMITTED by the Federal Agency for Technical Regulation and Metrology (Rosstandart)

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Minutes No. 80-P dated September 29, 2015)

The following voted in favor of adoption:

Short name of the country according to MC (ISO 3166) 004-97	Country code according to MC (ISO 3166) 004-97	Abbreviated name of the national standardization body
Azerbaijan	AZ	Azstandard
Armenia	AM	Ministry of Economy of the Republic of Armenia
Belarus	BY	Gosstandart of the Republic of Belarus
Georgia	GE	Gruzstandart
Kazakhstan	KZ	Gosstandart of the Republic of Kazakhstan
Kyrgyzstan	KG	Kyrgyzstandart
Moldova	MD	Moldova-Standard
Russia	RU	Rosstandart
Tajikistan	TJ	Tajikstandart
Turkmenistan	TM	Main State Service “Turkmenstandartlary”
Uzbekistan	UZ	Uzstandard
Ukraine	UA	Ministry of Economic Development of Ukraine

4 By Order of the Federal Agency for Technical Regulation and Metrology No. 401-st dated May 25, 2016, the interstate standard GOST EN 28839-2015 was put into effect as a national standard of the Russian Federation on January 1, 2018.

5 This standard is identical to the European regional standard EN 28839:1991* “Mechanical Properties of Fasteners. Bolts, Screws, Studs and Nuts Made of Non-Ferrous Metals” (“Mechanical properties of fasteners - Bolts, screws, studs and nuts made of non-ferrous metals”, IDT).

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• Access to international and foreign documents referenced in the text can be obtained by contacting the User Support Service. - Database producer’s note.

The European regional standard is identical to the international standard ISO 8839:1986, developed by Technical Committee ISO/TC 2 “Fasteners” of the International Organization for Standardization (ISO).

When applying this standard, it is recommended to use, instead of the referenced international standards, the corresponding interstate standards, information on which is given in Additional Annex DA

6 INTRODUCED FOR THE FIRST TIME

Information on amendments to this standard is published in the annual information index “National Standards” (as of January 1 of the current year), and the text of amendments and corrections - in the monthly information index “National Standards”. In case of revision (replacement) or cancellation of this standard, a corresponding notice will be published in the monthly information index “National Standards”. Relevant information, notices and texts are also posted in the publicly accessible information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet

1 Scope

This standard establishes mechanical properties for bolts, screws, studs and nuts:

• with nominal thread diameter d from M1.6 to M39 inclusive;

• with ISO metric thread in accordance with ISO 261;

• made of copper and copper alloys or aluminium and aluminium alloys.

This standard does not apply to bolts, screws, studs and nuts with special property requirements, such as:

• corrosion resistance;

• electrical conductivity.

2 Normative references

The following referenced documents* are necessary for the application of this standard. For dated references, only the cited edition of the referenced document applies. For undated references, the latest edition of the referenced document (including all amendments) applies.

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• For the correspondence table of national standards to international standards, see the link. - Database producer’s note.

ISO 1, Standard reference temperature for industrial length measurements (Standard temperature for industrial length measurement)

ISO 209, Wrought aluminium and aluminium alloys - Chemical composition of wrought products (Wrought aluminium and aluminium alloys. Chemical composition of wrought products)

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The title of the standard differs from the title of the current ISO 209:2007. However, to unambiguously comply with the requirement of this standard expressed as a dated reference, it is recommended to use only the edition specified in that reference.

ISO 261, ISO general purpose metric screw threads - General plan (ISO general-purpose metric screw threads. General plan)

ISO 426-1 Wrought copper-zinc alloys - Chemical composition and forms of wrought products - Part 1: Non-leaded and special copper-zinc alloys (Wrought copper-zinc alloys. Chemical composition and forms of wrought products. Part 1. Non-leaded and special copper-zinc alloys)

ISO 426-2, Wrought copper-zinc alloys - Chemical composition and forms of wrought products - Part 2: Leaded copper-zinc alloys (Wrought copper-zinc alloys. Chemical composition and forms of wrought products. Part 2. Leaded copper-zinc alloys)

ISO 427, Wrought copper-tin alloys - Chemical composition and forms of wrought products (Wrought copper-tin alloys. Chemical composition and forms of wrought products)

ISO 428, Wrought copper-aluminium alloys - Chemical composition and forms of wrought products (Wrought copper-aluminium alloys. Chemical composition and forms of wrought products)

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The standard has been cancelled without replacement.

ISO 898-1, Mechanical properties of fasteners - Part 1: Bolts, screws and studs (Mechanical properties of fasteners - Part 1: Bolts, screws and studs)

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The title of the standard differs from the title of the current ISO 898-1:2013. However, to unambiguously comply with the requirement of this standard expressed as a dated reference, it is recommended to use only the edition specified in that reference.

ISO 898-2, Mechanical properties of fasteners - Part 2: Nuts with specified proof load values (Mechanical properties of fasteners - Part 2: Nuts with specified proof load values)

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The title of the standard differs from the title of the current ISO 898-2:2012. However, to unambiguously comply with the requirement of this standard expressed as a dated reference, it is recommended to use only the edition specified in that reference.

ISO 898-7, Mechanical properties of fasteners - Part 7: Torsional test for bolts and screws with thread sizes from M1 to M10 (Mechanical properties of fasteners - Part 7. Torsion test for bolts and screws with thread sizes from M1 to M10)

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The title of the standard differs from the title of the current ISO 898-7:1992. However, to unambiguously comply with the requirement of this standard expressed as a dated reference, it is recommended to use only the edition specified in that reference.

ISO 1187, Special wrought copper alloys - Chemical composition and forms of wrought products (Special wrought copper alloys. Chemical composition and forms of wrought products)

ISO 1337, Wrought copper (having minimum copper contents of 99.85%) - Chemical composition and forms of wrought products (Wrought copper (with minimum copper content of 99.85%). Chemical composition and forms of wrought products)

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The standard has been cancelled without replacement.

3 Designation system and materials

Table 1 gives the symbols for materials used in designating products and as marking symbols (see Section 7), and also provides references to the corresponding international standards.

Table 1 - Material symbols

Symbol	Material designation	Corresponding international standard
CU1	Cu-ETP or Cu-FRHC	ISO 1337
CU2	CuZn37	ISO 426-1
CU3	CuZn39Pb3	ISO 426-2
CU4	CuSn6	ISO 427
CU5	CuNi1Si	ISO 1187
CU6	CuZn40Mn1Pb	-
CU7	CuAI10Ni5Fe4	ISO 428
AL1	AIMg3	ISO 209
AL2	AIMg5	ISO 209
AL3	AISi1MgMn	ISO 209
AL4	AICu4MgSi	ISO 209
AL5	AlZnMgCu 0.5	-
AL6	AIZn5.5MgCu	ISO 209

Bolts, screws, studs and nuts made of non-ferrous metals shall be designated in accordance with the following example:

Designation of a hexagon head bolt ISO 4014-M12x80 made of CuZn37 (see Table 1 for the corresponding material symbols):

Hexagon head bolt ISO 4014-M12×80-CU2

4 Mechanical properties

The mechanical properties of bolts, screws, studs and nuts shall conform to those given in Table 2, when tests are carried out at the standard temperature of 20°C, using the methods given in Section 6.

Note - In the case of large deformations during manufacture (for example, for special parts), the mechanical properties shall be agreed between the purchaser and the supplier.

Table 2 - Mechanical properties

Material		Nominal thread diameter d	Tensile strength , N/mm, not less than	Proof stress, N/mm, not less than	Percentage elongation after fracture A, %, not less than
Symbol	Designation
CU1	Cu-ETP or Cu-FRHC	M39	240	160	14
CU2	CuZn37	M6	440	340	11
		M6<M39	370	250	19
CU3	CuZn39Pb3	M6	440	340	11
		M6<M39	370	250	19
CU4	CuSn6	M12	470	340	22
		M12<M39	400	200	33
CU5	CuNi1Si	M30	590	540	12
CU6	CuZn40Mn1Pb	M6<M39	440	180	18
CU7	CuAI10Ni5Fe4	M12<M39	640	270	15
AL1	AIMg3	M10	270	230	3
		M10<M20	250	180	4
AL2	AIMg5	M14	310	205	6
		M14<M36	280	200	6
AL3	AISi1MgMn	M6	320	250	7
		M6<M39	310	260	10
AL4	AICu4MgSi	M10	420	290	6
		M10<M39	380	260	10
AL5	AlZnMgCu 0.5	M39	460	380	7
AL6	AIZn5.5MgCu	M39	510	440	7

5 Controlled mechanical properties

Table 3 indicates the types of tests to which bolts, screws, studs and nuts shall be subjected. Other tests may be carried out by agreement between the purchaser and the supplier.

Table 3 - Controlled mechanical properties

Nominal thread diameter d	Test to which subjected
	bolts, screws and studs	nuts
M5	Tensile tests. Torsional resistance tests	Proof load tests
M5	Tensile tests (also, if required, for proof stress and elongation after fracture)

6.1 Tensile tests applicable to bolts, screws and studs

Full-size bolts, screws or studs are subjected to tensile tests. The tests are performed in accordance with ISO 898-1. The minimum breaking loads are given in Table 4.

To determine the proof stress and elongation after fracture, tests are performed in accordance with ISO 898-1 on machined test pieces.

Table 4 - Minimum breaking loads

Nominal thread diameter d	Thread pitch P, mm	Nominal stress area , mm	Material designations
			CU1	CU2	CU3	CU4	CU5	CU6	CU7	AL1	AL2	AL3	AL4	AL5	AL6
			Minimum breaking load, , N
M3	0.5	5.03	1210	2210	2210	2360	2970	-	-	1360	1560	1610	2110	2310	2570
M3.5	0.6	6.78	1630	2980	2980	3190	4000	-	-	1830	2100	2170	2850	3120	3460
M4	0.7	8.78	2110	3860	3860	4130	5180	-	-	2370	2720	2810	3690	4040	4480
M5	0.8	14.2	3410	6250	6250	6670	8380	-	-	3830	4400	4540	5960	6530	7240
M6	1	20.1	4820	8840	8840	9450	11860	-	-	5430	6230	6430	8440	9250	10250
M7	1	28.9	6940	10690	10690	13580	17050	12720	-	7800	8960	8960	12140	13290	14740
M8	1.25	36.6	8780	13540	13540	17200	21590	16100	-	9880	11350	11350	15370	16840	18670
M10	1.5	58.0	13920	21460	21460	27260	34220	25520	-	15660	17980	17980	24360	26680	29580
M12	1.75	84.3	20230	31190	31190	39620	49740	37090	-	21080	26130	26130	32030	38780	42990
M14	2	115	27600	42550	42550	46000	67850	50600	73600	28750	35650	35650	43700	52900	58650
M16	2	157	37680	58090	58090	62800	92630	69080	100500	39250	43960	48670	59660	72220	80070
M18	2.5	192	46080	71040	71040	76800	113300	84480	122900	48000	53760	59520	72960	88320	97920
M20	2.5	245	58800	90650	90650	98000	144500	107800	156800	61250	68600	75950	93100	112700	124900
M22	2.5	303	72720	112100	112100	121200	178800	133300	193900	-	84840	93930	115100	139400	154500
M24	3	353	84720	130600	130600	141200	208300	155300	225900	-	98840	109400	134100	162400	180000
M27	3	459	110200	169800	169800	183600	270800	202000	293800	-	128500	142300	174400	211100	234100
M30	3.5	561	134600	207600	207600	224400	331000	246800	359000	-	157100	173900	213200	258100	286100
M33	3.5	694	166600	256800	256800	277600	-	305400	444200	-	194300	215100	263700	319200	353900
M36	4	817	196100	302300	302300	326800	-	359500	522900	-	228800	253300	310500	375800	416700
M39	4	976	234200	361100	361100	390400	-	429400	624600	-	-	302600	370900	449000	497800
For nuts, proof load

6.2 Torsional resistance tests

A full-size bolt or screw is subjected to torsional resistance tests; the tests are performed in accordance with ISO 898-7. The accuracy of the measuring instrument shall be within ±7% of the minimum breaking torque during testing. Bolts or screws shall withstand the minimum breaking torques specified in Table 5.

Table 5 - Minimum breaking torques

Nominal thread diameter d	Material designations
	CU1	CU2	CU3	CU4	CU5	AL1	AL2	AL3	AL4	AL5	AL6
	Minimum breaking torque, N·m
M1.6	0.06	0.10	0.10	0.11	0.14	0.06	0.07	0.08	0.1	0.11	0.12
M2	0.12	0.21	0.21	0.23	0.28	0.13	0.15	0.16	0.2	0.22	0.25
M2.5	0.24	0.45	0.45	0.5	0.6	0.27	0.3	0.3	0.43	0.47	0.5
M3	0.4	0.8	0.8	0.9	1.1	0.5	0.6	0.6	0.8	0.8	0.9
M3.5	0.7	1.3	1.3	1.4	1.7	0.8	0.9	0.9	1.2	1.3	1.5
M4	1	1.9	1.9	2	2.5	1.1	1.3	1.4	1.8	1.9	2.2
M5	2.1	3.8	3.8	4.1	5.1	2.4	2.7	2.8	3.7	4	4.5

6.3 Proof load tests for nuts

Proof load tests for nuts are performed using the methods described in ISO 898-2. Nuts shall withstand proof loads equal in value to the minimum breaking loads for the corresponding bolts, screws or studs specified in Table 4.

7.1 Marking symbols

The designations given in Table 1 are used as marking symbols.

7.2 Identification

Identification of bolts, screws, studs and nuts is in accordance with ISO 898-1 and ISO 898-2.

Annex DA (informative). Information on the conformity of referenced international standards to referenced interstate standards

Annex DA

(informative)

Table DA.1 - Information on the conformity of referenced international standards to referenced interstate standards

Designation of the referenced international standard	Degree of conformity	Designation and title of the corresponding interstate standard
ISO 1	-	*
ISO 209	NEQ	GOST 4784-1997 “Aluminium and wrought aluminium alloys. Grades”
ISO 261	MOD	GOST 8724-2002 (ISO 261:1998)** “Basic standards of interchangeability. Metric thread. Diameters and pitches”
ISO 426-1	NEQ	GOST 15527-2004 “Wrought copper-zinc alloys (brasses). Grades”
ISO 426-2	NEQ	GOST 15527-2004 “Wrought copper-zinc alloys (brasses). Grades”
ISO 427	-	*
ISO 428	-	*
ISO 898-1	IDT	GOST ISO 898-1-2014 “Mechanical properties of fasteners made of carbon steel and alloy steel. Part 1. Bolts, screws and studs with specified property classes, coarse thread and fine pitch thread”
ISO 898-2	IDT	GOST ISO 898-2-2015 “Mechanical properties of fasteners made of carbon steel and alloy steel. Part 2. Nuts with specified property classes, coarse thread and fine pitch thread”
ISO 898-7	IDT	GOST ISO 898-7-2015 “Mechanical properties of fasteners. Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters from 1 to 10”
ISO 1187	-	*
ISO 1337	-	*
* There is no corresponding interstate standard. Until one is adopted, it is recommended to use a Russian translation of this international standard or a national standard of the country where this standard is applied that is harmonized with it. Information on the availability of a translation of this international standard in the national fund of standards or elsewhere, as well as information on the validity of the corresponding national standard in the country, may be provided in the national information data supplementing this standard. ** The technical deviations introduced ensure compliance with the requirements of this standard. Note - This table uses the following designations for the degree of conformity of standards: - IDT - identical standards; - MOD - modified standards; - NEQ - non-equivalent standards.

UDC 621.882:620.17:006.354	ICS 21.060.10	G30	IDT
	ICS 21.060.20
Keywords: mechanical properties, bolts, screws, studs, nuts, non-ferrous metals

Electronic text of the document

prepared by JSC “Kodeks” and verified against:

official edition

Moscow: Standartinform, 2016