GOST 11530-93 Bolts for Railway Rail Joints. Specifications

GOST 11530-93

Group D55

INTERSTATE STANDARD

BOLTS FOR RAILWAY RAIL JOINTS

Technical specifications

Rail joint bolts. Specifications

ICS 45.080

OKP 12 9600

Effective date 1995-01-01

Foreword

1 DEVELOPED BY Gosstandart of Russia

SUBMITTED BY the Technical Secretariat of the Interstate Council for Standardization, Metrology and Certification

2 ADOPTED BY the Interstate Council for Standardization, Metrology and Certification on October 21, 1993

The following voted in favor of adoption:

Name of state	Name of national standardization body
Republic of Belarus	Belstandart
Republic of Kyrgyzstan	Kyrgyzstandart
Republic of Moldova	Moldovastandart
Russian Federation	Gosstandart of Russia
Republic of Tajikistan	Tajikstandart
Turkmenistan	Turkmenglavgosinspektsiya
Ukraine	Gosstandart of Ukraine

3 By Resolution No. 160 of the Committee of the Russian Federation for Standardization, Metrology and Certification dated June 2, 1994, interstate standard GOST 11530-93 was put into effect as a state standard of the Russian Federation on January 1, 1995.

4 SUPERSEDES GOST 11530-76

5 REISSUE. July 2006

INFORMATIONAL DATA

REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

Designation of the referenced regulatory document	Clause number
GOST 1497-84	4.4
GOST 1759.0-87	2.1
GOST 1759.1-82	2.6, 4.2
GOST 1759.2-82	2.7, 4.3
GOST 1759.4-87	2.2, 3.2, 4.4, 4.5
GOST 9454-78	4.5
GOST 11532-93	2.9
GOST 16018-79	Introductory part, 2.9
GOST 16093-2004	2.4
GOST 17769-83	3.1
GOST 18160-72	2.12
GOST 24705-2004	2.3

This standard applies to bolts with a round head and oval neck, product grade C, used to fasten double-head fishplates at joints of railway rails of types R38, R43, R50, R65 and R75, as well as to bolts with a reduced oval neck height for insulated joints of the specified rail types.

The requirements of this standard are mandatory.

When bolts are supplied for export as individual products, the requirements of this standard and GOST 16018 shall be taken into account.

1 Design and dimensions

1.1 The design and dimensions of bolts shall conform to those shown in the figure and Table 1.

Fig. Version 1

Type 1

Fig. Version 2

Type 2

; , - pitch diameter of the thread

Table 1

mm
			M22	M24	M27
(limit deviation ±1.25)			37	40	46
(limit deviation ±0.9)			13	14	17
Symmetry tolerance of the head relative to the shank axis, in diametrical terms, not more than			2.0
	Limit deviation -1.0		31	33	38
			30	32	37
(limit deviation -2.1)			22	24	27
	Limit deviation -1.8		12
			6
			From 1 to 2
, not less than			3
(limit deviation +6)			56	66
Thread pitch,			2.5	3.0
of version (limit deviation +6)		1	135	150	130; 160
		2	140	140; 160	150; 180

Designation examples

Bolt of product grade C, version 1, thread diameter 24 mm, coarse pitch thread, tolerance field 8g, length 150 mm, property class 8.8, made of steel grade 35:

Bolt M24-8gx150.88.35 GOST 11530-93

Same, version 2, length 160 mm, property class 10.9, made of steel grade 40Kh:

Bolt 2M24-8gx160.109.40X GOST 11530-93

2. Technical requirements

2.1 Bolts for rail joints shall be manufactured in accordance with the requirements of this standard and GOST 1759.0.

2.2 Bolts shall be manufactured to property class 8.8 per * from steel grade 35, and to property class 10.9 per GOST 1759.4* from steel grade 40Kh or other grades ensuring bolts of property classes 8.8 and 10.9.

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• This document is not in effect in the territory of the Russian Federation. GOST R 52627-2006 is in effect, hereinafter in the text. — Database producer’s note.

2.3 Thread — per GOST 24705.

2.4 Tolerance field 8g — per GOST 16093; tolerance field 8h is permitted.

2.5 Rounding of the head edges with a radius of up to 1.5 mm that does not take the head diameter outside the limit deviations is permitted, as is a burr or flash up to 1.5 mm located around the perimeter of the bolt head perpendicular to its axis.

2.6 Tolerances for form and position deviations of surfaces — per GOST 1759.1*.

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• This document is not in effect in the territory of the Russian Federation. GOST R ISO 4759-1-2009 is in effect, hereinafter in the text. — Database producer’s note.

2.7 Permissible surface defects of bolts — per GOST 1759.2*.

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• This document is not in effect in the territory of the Russian Federation. GOST R ISO 6157-1-2009 is in effect, hereinafter in the text. — Database producer’s note.

2.8 The mass of bolts is given in the appendix.

M22 bolts may be supplied complete with nuts per GOST 16018.

Packaging of bolts together with nuts of the same size in the same container is permitted.

2.10 The head of each bolt shall carry marking containing the trademark or code designation of the manufacturer.

On bolts of property class 10.9, the letter “P” shall additionally be marked.

The size of the marking symbols is determined by the manufacturer.

2.11 The marking symbols shall be clearly visible to the naked eye regardless of the surface finish quality.

2.12 Packaging of bolts and marking of containers — per GOST 18160.

3. Acceptance

3.1 Acceptance rules — per GOST 17769* for products of product grade C.

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• This document is not in effect in the territory of the Russian Federation. GOST R ISO 3269-2009 is in effect. — Database producer’s note.

3.2 Testing of the mechanical properties of bolts shall be carried out at the consumer’s request per GOST 1759.4.

3.3 Checking of tensile strength by the destructive testing method shall be performed on 5 bolts, and by the non-destructive method on 8 bolts, from the batch presented.

4. Test methods

4.1 Inspection of the appearance of bolts shall be performed without the use of magnifying instruments.

4.2 Methods for dimensional inspection — per GOST 1759.1.

4.3 Inspection of surface defects — per GOST 1759.2.

4.4 Inspection of tensile strength — per GOST 1497 and clause 6.2 of GOST 1759.4.

4.5 Determination of impact toughness — per GOST 9454 and clause 6.6 of GOST 1759.4.

4.6 A bolt is considered to have passed the tensile test () if failure occurs in the shank or thread, but not at the junction of the head and shank, at the loads specified in Table 2.

Table 2

Bolt thread diameter	Minimum breaking load for bolts of property classes, N (kgf)
	8.8	10.9
M22	252000 (25700)	315000 (32100)
M24	293000 (29900)	367000 (37400)
M27	381000 (38800)	477000 (48600)

5. Transportation

Transportation of bolts together with nuts may be carried out by any mode of transport, except railway flatcars.

Transportation of bolts without packaging is allowed.

APPENDIX (informative). Theoretical mass of 1000 bolts for rail joints, kg

Table 3

Bolt dimensions	Mass
M22×135	448
M24×150	585
M27×130	696
M27×160	818
2M22×140	449
2M24×140	522
2M24×160	592
2M27×150	750
2M27×180	872
Note - The mass of bolts is determined based on nominal dimensions and a steel density of 7850 kg/m³.