... experiences 2.Black or machined surface Cold Work Tool Steel Cr12,D3, SKD1 ,1.2080Characteristics:1 ... .A kind of widely used cold work tool steel, belong to carbon chromium ledeburitic steel.2 ... making all kinds of complex shape hot work tool steel in heavy running condition.4.After repeated ... ,drilling bushing ,gauge, wortle, coining die,thread rolling die, screw thread rolling die and so on, which are ...