China 36CrNiMo4-Alloy steel is often used in preference to AISI 4140 at the higher strength levels because of its better hardenability and improved CVN impact toughness.Typical applications include:Heavy-duty axles, shafts, heavy-duty gears,spindles, pins, studs, collets, bolts, couplings,sprockets, pinions, torsion bars, connecting rods,crow bars, conveyor parts,forged hydraulic,forged steel crankshafts etc.
Heat Treatment Conditions
- +A Soft annealed/Soft annealing
- +N Normalized/Normalizing
- +QT Quenched and Tempered
- +U Untreated
- +SR Stress Relieved
Normalizing:850℃-880℃,Cool in air
Soft Annealing:830℃-850℃,furnace cooling to 610℃ at a rate of 11℃ per hour, finally air cooling.
Stress Relieving:600 °C – 650 °C,Cooling in air
Tempering:450℃- 660℃, cool in still air
Hot-rolled bars 36CrNiMo4, 1.6511, 36HNM
Forgings, forged rings and bars 36HNM, 36CrNiMo4, 1.6511