Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels (ISO 683-17:1999); German version EN ISO 683-17:1999— 20 стр.
Quenched and tempered steels - Part 1: Technical delivery conditions for special steels (includes Amendment A1:1996); German version EN 10083-1:1991 + A1:1996— 38 стр.