BS 64:1992 pdf download.Normal and high strength steel bolts and nuts for railway rail fishplates.
1 Scope This British Standard specifies the dimensions and requirements for normal and high strength bolts and nuts for fishplates conforming to BS 47-1:1991 for use with railway rails conforming to BS 11:1985. The provisions of this specification are not restricted to fishbolts for use with rails and fishplates conforming to BS 11:1985 and BS 47-1:1991 and may be applied to fishbolts for any rail section of 24.8 kg/m (50 lb/yd) or greater linear mass and the complementary fishplates.
2 References
2.1 Normative references This British Standard incorporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard only when incorporated in it by updating or revision.
2.2 Informative references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of this standard are listed on the inside back cover, but reference should be made to the latest editions.
3 Material The steelmaking process and grade of steel shall be at the discretion of the manufacturer to obtain the mechanical properties specified in clause 6. The sulfur and phosphorus content shall not exceed 0.06 %.
4 Manufacture Bolts shall be produced by hot or cold forging. Nuts shall be hot or cold forged or machined from bar. Bolts and nuts shall be free from manufacturing defects adversely affecting their behaviour in service. No manufacturing operations shall be carried out with the object of concealing defects.
5 Heat treatment Bolts and nuts shall be heat treated when necessary to obtain the mechanical properties given in clause 6. Cold forged bolts shall be thermally stress relieved. No heat treatment shall be applied which would adversely affect the performance of the fishbolts or nuts in service.
6.3.2.2 Proof load test When proof load tested in accordance with BS EN 20898-1:1992 high strength grade bolts shall conform to Table 1 or Table 2 as appropriate.
6.3.3 Machined test pieces (from full size bolts) When tested in accordance with BS EN 10002-1:1990 the bolts shall have the mechanical properties given in Table 3.
6.4 Nuts When tested in accordance with the appropriate British Standard the nuts shall have the hardness values given in Table 4.
6.5 Retests If any of the mechanical tests carried out fail to conform to 6.1 to 6.4, two further retests from the same batch of fishbolts or nuts shall be taken. If one or both of the retests is not satisfactory the corresponding batch shall not have conformed to this British Standard.
BS 64 pdf download.