HECO-TOPIX-plus Senkkopf HD-20 4,0 x 45, A2

Grade 1.4567 is an austenitic stainless steel of the A2 type for general applications. Due to its copper content of 3 per cent to 4 per cent, it is ideally suited to cold forming, but is susceptible to stress corrosion cracking and intergranular corrosion. It does not exhibit brittle fracture behaviour and can therefore be used at low temperatures.

Stainless steels are defined in DIN EN 10088-1 as iron alloys containing at least 10.5 per cent chromium and no more than 1.2 per cent carbon. The multi-part DIN EN ISO 3506 series of standards applies to mechanical fasteners made from stainless steels. Grade A2 is classified as non-acid-resistant. Austenitic stainless steels cannot be heat-treated and achieve their different strength classes through cold working to varying degrees.