Yong Wei steel mold (Dongguan) Co. _440C supplier _ provided by Yong Wei Conghua 440C steel mold (Dongguan) Limited. We are a steel mold, Dongguan City, An Yongwei shop (www.dgyongwei.com) located at: Dongguan specializes in: mold steel, DC53, SKD11.SUS440C, SUS420 steel mold supplier selection and identify qualified mold steel suppliers should by selecting determined. And get a qualified mold steel suppliers, depends above for each supplier quality assurance capability assessment results and production usage, price, reputation and other factors. Therefore, the finalization of suppliers, should be more appropriate to select a few different kinds of mold steel suppliers to compare 440C materials, especially the production and use of quality assurance ability suppliers fairly basic case. M202 has been heat-treated steel, uniform hardness, up 278-311HB 440C suppliers, 29-33HRC, never made mold variant 440C, excellent cutting and polishing performance for electrical erosion operation 440C steel mold can be flame hardened surface chrome and nitriding. Chemical Composition C W tungsten carbon chromium Cr Mn Si silicon manganese vanadium V 0.95 0.5 0.5 1.1 0.3 0.1 Specification M202 factory specifications: Pre-hardened to 950-1050N / mm2 (29-33HRC). M202 uses: all size plastic molds, and can be used for tin, lead, zinc alloy die-casting mold of the mold base. M202 Forged: 1050-850 ℃ furnace cooling. M202 mass recovery: 850-900 ℃ furnace cooling. M202 stress relief: After the heat evenly, stay cool in the oven for 1-2 hours. M202 quenching: Oil 840-860 ℃ or air: 860-880 ℃. Stay for at least 10 minutes, and the thickness of 20mm, see more than half minutes per 1mm, so that hardness of about 54HRC. M202 tempering: stay at least 1 hour tempering, each will have more than one hour more than 20mm 20mm thick or more.