Elements C Cr V Mo Mn Si P Percent (%) 11.5 1.0 0.7 0.4 0.3 1.55 0.001 mechanical properties K110 quenching and tempering specification: quenching temperature 1020 ~ 1040 ℃, air, oil cooling, tempering temperature 180 ~ 200 ℃, hardness 60 ~ 62HRC. Forged Heat Treatment: final forging initial forging 1050oC 850oC, with furnace cooling. Or cold insulation materials. Annealing: 800-850oC. After incubation for 10-20 oC / HR, cooled to about 600 oC, then cooled, and finally the hardness HB250. Stress relief: shielding gas, 600-700oC, 1-2HRS, with furnace cooling. Quenching: 1020-1040oC, shape complex elements, air-cooled, shape simple pieces; air-cooled or oil cooling; or 400-450oC prison bath (200-250 oC) quenching, isothermal time 15-30 minutes. Quenching and tempering hardness HRC63-65o: when tempering grade. Tempering hardness tempering curves. Tempering time is one hour per 20mm thickness, clams Wang less than 2HRS, air-cooled high-quality high-chrome outline K110 cold work die steel, high carbon, high chromium type ledeburite. The steel has good hardenability and good abrasion resistance. Because steel is rich in hard metal carbides, special added vanadium, molybdenum alloying elements, wrought by vacuum degassing process is made fine and uniform distribution of carbide particles, high temperature tempering after quenching, hardness and wear resistance is not reduced. Suitable for precision stamping dies, cold extrusion, drawing dies, die-punch, instrument BOM.