1 M201 special carbon steel chemical composition C Cr Mn Mn Cr Mo Si aluminum silicon S sulfur 0.421.50.20.30.003 2 M201 mold steel factory state pre-hardened to 980-1080N / (30-34HRC) 3 steel uniform features of this steel hardness, because of the low sulfur content of more transport pitting Han (sparks), easy to mirror polished, can be used as flame hardened, chrome plated and oxidation use all 4 size plastic molds and can be used for tin, lead, zinc alloy die casting forging and heat treatment mold base 5: 1.050 ℃ satin start playing until 850 ℃ stop, melted down with furnace annealing 710-750 ℃ ??slow cooling protective gas furnace slow cooling body stress relief: 650 ℃ incubated for 1-2 hours followed by slow cooling quenching furnace by: 870-820C ℃ after soaking through heat quenching oil or 200-250 ℃ nitrate liquid quenching, tempering immediate cooling to 50-70 ℃