... years of production 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.With good quench-hardening ability, ... in making cold die and punch, cold shearing ,drilling bushing ,gauge, wortle, coining die,thread rolling die, screw thread rolling die and so ...