China 36CrNiMo4-Alloy steel is defined as a heat treatable and low alloy steel which has 0.8% Cr, 0.2% Mo and 1.8% Ni as strengthening alloy elements.Compared with AISI 4140,it has higher strength and toughness,also it has very good fatigue resistance, wear resistance and atmospheric corrosion resistance.36CrNiMo4 / 1.6511 is generally supplied in hardened and tempered condition with the tensile range of 930 – 1080 Mpa ,hardness 280-320HB.Pre hardened and tempered 4340 can be further surface hardened by flame or induction hardening and by nitriding.
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.
| C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.32 – 0.4 | max 0.4 | 0.5 – 0.8 | 0.9-1.2 | max 0.035 | max 0.035 | 0.9-1.2 | 0.15-0.3 |
| EU | Germany | Japan | France | England | China | Russia | Inter |
| EN | DIN,WNr | JIS | AFNOR | BS | GB | GOST | ISO |
| 36CrNiMo4 | 36CrNiMo4 | SCNM439 | 40NCD3 | 817A37
817M37 |
36CrNiMo | 40KHN2MA | 36CrNiMo4 |
| Surface Finish | Size Tolerance | Length |
| Black For Forged condition | (0，+5mm) | Multiple Length/Fixed Length |
| Black For Rolled condition | (0，+1mm) | |
| Rough Turned | (0，+3mm) |
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
Hardening:830℃-865℃,oil quench
Tempering:450℃- 660℃, cool in still air
Hot-rolled bars 36CrNiMo4, 1.6511, 36HNM
Forgings, forged rings and bars 36HNM, 36CrNiMo4, 1.6511
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We have professional relevant personnel and will do our best to solve your problems, please be sure to contact us.
Our staff are highly-specialized and will help you find the steel you need.
