Stainless Steel Fasteners to BS EN ISO 3506 （不锈钢紧固件BS EN ISO 3506）.pdf

Stainless Steel Advisory Service Tel: 0114 267 1265 Fax 0114 266 1252 A service provided by the SSAS Information Sheet No.2.31 British Stainless Steel Association Issue 05 27th Sept 2007 Page 1 of 3 Stainless Steel Fasteners to BS EN ISO 3506 Grades A1, A2 (A3) A4 (A5) Stainless steel fasteners are specified in BS EN ISO 3506 Part 1 covers bolts, screw studs. Part 2 covers nuts and part 4 (published in 2003), covers tapping screws. These specifications replace BS6105, which is withdrawn as a British Standard. Chemical Compositions The chemical compositions of austenitic stainless steel fasteners with the designations A1, A2 A4 are shown in table 1. (These designations are common for the different parts of BSENISO 3506. The composition ranges are based on part 1 and vary slightly to those in part 4). The table shows some of the grade designations, which have been used, in other British Standards Table 1 - Chemical Compositions for Austenitic Stainless Steel Fasteners Grade Chemical Composition (% maxima unless stated) Types C Si Mn S P Cr