S-STAR 

 1 Chemical composition% C: 0.38 Si: 0.9 Cr: 13.5 Mo: 0.1 V: 0.3 S-STAR Assab quality tool steel, the implementation of standards: HRC37-43 Japan Datong Steel Co., Ltd. for the production of S-STAR Pre-hard corrosion-resistant high-polished stainless steel, suitable for high glossy, high wear and corrosion resistance of the mold. S-STAR is a super glossy, high hardness and corrosion resistance of martensitic stainless plastic mold steel, made by a special melting, the chemical composition of 0.38C-0.9Si-13.5Cr-0.1Mo-0.3V, the ≤ 229HB hardness in delivery or in (30 ~ 34) HRC pre-hardened state. After the final heat treatment after machining is: at 500 ℃ and 800 ℃, after two warm-heated to 1020 ~ 1070 ℃ austenitizing and oil cooling, air or gas quenching, quenching hardness up to 56HRC, as the resistance to tempering corrosion or hardness in the 200 ~ 400 ℃ or 490 ~ 510 ℃ range, generally require two times, tempering followed by air cooling, up to 53HRC so, can also be cold treatment. Suitable for manufacturing the camera body, records, and the case of plastic lens mold. 2.S-STAR (SUPER-STAR) of the main features: corrosion resistance, good heat-treated hardness: HRC54 excellent throwing the highest optical activity good hardenability and heat treatment heat treatment a very small change material hardness distribution of well-etching process, electrical discharge machining of Pre-hardened HRC30-34 states use 3.S-STAR (SUPER-STAR) of the main purposes: forming material products case PMMA, PC, EP, PP, PS, PVC, PE, PF increase the flame resistance to corrosion / super mirror / high-life optical lenses using plastic molds, medical equipment, mold cosmetic container mold, food container mold 4. Features: High polish resistance, good corrosion resistance, wear resistance, dimensional stability, good corrosion resistance (martensitic stainless ) Heat Treatment Hardness: up to 53HRC super-mirror thermal dimensional changes of a very small (0.03% or less) within the uniform sound quality (ESR refining) etching processing, EDM good pre-hardened state of delivery, can also make direct carving