... of production experiences 2.Black or machined surface Cold Work Tool Steel Cr12,D3, SKD1 ,1 ... resistance, it is widely used in making cold die and punch, cold shearing ,drilling bushing ,gauge, wortle, ... national standards(GB) or agreement. 2. We can not only provide electric furnace +LF+VD and ... . Our company is equipped with roll equipment and can provide our customers with roll billets or finished. ...