... +turned/grinded 3.UT : En 1921C/c mould steel HMD1Specialized tool steel(7CrSiMnV, CH, CH-1, Cr12MoV, 9Mn2V, CrWMn, GC15, T10A, CrSiMnMoV, HMD5 ... ) Application: various large-sized mirror plastic mould, precision plastic mould, like: cars accessies, home appliances, electronic equipment plastic mould HMD-1 die steel