What is the hardness of mould steel chromium 12 unquenching?
The steel of the Cr12 is annealed, the hardness is 217-269hbw, Shanghai ai liai metal material, wholeheartedly for your service.
After hardening, the hardness can reach 50 to 52HRC Chromium steel has high antioxidant and corrosion resistance. In order to use the environment, other elements such as molybdenum, vanadium, tungsten, titanium, niobium and boron are often added. Commonly used applications and steel grade 12 crmo (high, medium pressure steam pipe), 20 crmo (blade), 35 crmo (parts) used for a long time under 650 ℃, 1 cr5mo (reheater under 650 ℃, 650 ℃ erosion under strong sex of petrochemical equipment), 1 cr12mo (blade under 450 ℃).
The CR12 mould steel is widely used for cold making mold steel, with high strength, good hardening and good abrasion resistance, but the impact toughness is poor. Mainly used as under impact load is small, high wear resistance of cold die and punch, cold cutting scissors, drill sets, gauge, wire drawing die, stamping die, thread rolling plate, drawing die and screw thread rolling dies, etc. Cr12 steel belongs to high carbon high chromium ledeburite steel, is widely used cold work die steel. The steel has good hardenability, abrasion resistance, hot workability. Carbide distribution in the steel is good, can be used to make complex shape, under heavy working conditions of all kinds of cold work mould. Such as cold die punch, thread rolling dies, wire drawing die, die, powder metallurgy die, woodworking cutting tools, cold cutting scissors drill tool and gauge set. CR12 steel hardness in the return of the state for 269 ~ 217 hb, a maximum of 62 HRC after quenching, according to different purposes, can choose a different hardness and reasonable hardness range should be around 58-62 HRC.
