... 1.2083, NAK80, etc.Cold Work Steel: 1.2842, 1.2379, 1.2080, 1.2436, M2, etc.Hot Work Steel: ... 1.2344, 1.2343,1.2714 etc.2- Carbon Structure Steel: ... Ck45, 1055 etc.3- Bearing Steel: SAE52100, 9260( ... Alloy Structure Steel: 4140, 4145H,4340, 8620, 16-20MnCr5, etc.5- Stainless Steel: 304, 316,321, 309,310, 420etc ...