... 20 years of production experiences 2.Black or machined surface Cold Work Tool Steel Cr12,D3, SKD1 ,1.2080Characteristics:1 ... we create reasonable smelt technique and special ingot mould and forging technique, lead the material organization to well-distributed and accordance ... good wear resistance, it is widely used in making cold die and punch, cold shearing ,drilling bushing ,gauge, wortle, coining die ...