M310 high-quality corrosion-resistant mirror mold steel, the furnace re-refining method (ESR) refining, steel clean uniform, well-structured, high density, excellent polishing performance, with anti-corrosion function, after hardening up to 57HRC. All general chemicals with corrosion resistance, suitable for the manufacture of transparent plastic mold PVC plastic mold, mold on the optics, especially for the high demands of the particular cassette and tape mold. Factory state: soft melted down to 225HB (highest) Steel Characteristics: acid resistance of high chromium stainless steel, hardened die after a very resistant, excellent cutting and polishing performance. The main components of C carbon Cr chromium Mn Mn Mo Si silicon molybdenum vanadium V 0.41 14.30 0.45 0.60 0.20 0.70