China 42CrMo4-Alloy steel is an European standard alloy steel, the delivery condition of this steel is mostly tempered and quenched, it has high strength, high toughness, good hardenability, temper brittleness, high fatigue limit, good impact resistance after quenching and tempering, and good low temperature impact toughness. This steel is suitable for the manufacture of large and medium-sized plastic molds requiring a certain degree of strength and toughness, transmission gears, rear axles, load-carrying connecting rods, spring clips and oil deep well drill pipe joints.
China 42CrMo4-Alloy steel is widely used for engineering steel purpose, such as: making various kinds of machinery, automobile, mining spare part, the gearwheel of the engine, the driving gear of supercharger, the connecting rob, the pinchock under the high pressure, parts for power train applications, cold formed fastenercomponents, shafts, gears, drill collars for the oil exploration, etc.
Heat Treatment Conditions
- +A Soft annealed/Soft annealing
- +N Normalized/Normalizing
- +QT Quenched and Tempered
- +U Untreated
- +SR Stress Relieved
Normalizing: 850 – 880°C,Cooling in air
Soft Annealing:680 – 720°C,Cooling in furnace
Stress relieve:450-650°C,Cooling in air
Hardening:820 – 880°C,oil or water quench
Tempering:540 – 680°C,Cooling in air
Drawn and hot-rolled bars, flat bars 42CrMo4,1.7225
Forgings and forged bars in grade 42CrMo4,1.7225