Main of the steel: Cr12(D3,SKD1), Cr12MoV(SKD11), Cr12Mo1V1 (D2, SKD11,1.2379), Cr12MoVCo, Cr5Mo1V (A2,SKD12) , 5-6CrW2Si ,4-5H12, H13(4Cr5MoSiV1, 1.2344), 4Cr3Mo3SiV(H10), 3Cr2Mo(P20), 3Cr2MnNiMo(718, 1.2378),5CrMnMo, 5CrNiMo, 9Cr2Mo, W6Mo5Cr4V2(M2) and so on.