- EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steels
- EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions
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) |
- Tensile Strength:min. 740 N/mm2
- Yield Strength:min. 540N/mm2
- Elongation:min.10%(l)
- Kv-Imapct value:min.48J (l)
- +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
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
