BS 1506: 1990 : Specification for Carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications
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This British Standard specifies requirements for the following two types of product:
a) bars of round, square and hexagonal cross sections, in nominal diameters or width across flats as specified in table 1 and 2 and the conditions of supply given in appendix C, intended for the manufacture of bolts, studs and nuts for pressure retaining applications at either sub>zero or elevated temperatures;
b) rolled billets and forged billets (i.e. semi-finished bars) in nominal diameters or width across flats as specified in tables 1 and 2, intended for further processing into bars and blanks for the products describes in (a)
BS 1506: 1990 : Specification for Carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications