carbon and alloy steels, including heat-resistant, stamped, rolled and tool steels, such as: 18KHGT, 12KHN3A, 20KHN3A, 3KH3M3F, 3KH2V8F, 9KHS, X12MF, 4X5MFS, 4X5V2FS, U10A, U8A, HVG, 5KHNM, 6KHV2S, R6M5, 38KH2MYA, 40KHN2MA, SHKH15, 5KHV2C, 5KHNV, 7KH3, 9X1, X12F1. 20X13, 30X13, 40X13, 95X18, R18, 30XGSA, st45, st65G, etc.