1.1 This part of ISO 683 specifies the technical delivery requirements for five groups of wrought ball and roller bearing steels as listed in Table 3, namely— through-hardening bearing steels (steels with about 1 % C and 1 % to 2 % Cr),— case-hardening bearing steels,— induction-hardening bearing steels (unalloyed and alloyed),— stainless bearing steels, and— high-temperature bearing steels.1.2 This part of ISO 683 applies to the products and heat-treatment conditions given in Table 1 and the surface conditions given in Table 2.1.3 In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are applicable.