20mncr5 case hardening steel
20mncr5 case hardening steel
Specification
it is a case-hardening steel with low carbon content but good hardenability reaching good wear resistance due to high surface hardness after hardening. The small grain size benefits in good ductility and fatigue strength. 20MnCr5 gearing steel is DIN standard Alloy Carburizing gearing steel, 20MnCr5 gearing steel properties is a chromium, manganese, titanium alloy steel specification.
Application
DIN 20MnCr5|1.7147 gearing steel is widely used for a variety of applications in the used to the gearings in rotating machinery. Typical applications such as valve bodies, pumps and fittings, the high load of wheel, bolts, double-headed bolts, gears, internal combustion engine. Electric locomotives, machine tools, tractors, steel rolling equipment, boring machine, railway vehicle, and mining machinery transmission shaft on the steel ball, Clutch plates, Camshafts, Drive wheels, Pins, roller and shaft sleeve etc.
Chemical Analysis %
| C | Mn | Cr | Si | P | S |
|---|---|---|---|---|---|
| 0.17-0.22 | 1.00-1.40 | 1.00-1.30 | 0.40 MAX | 0.035 Max | 0.035 Max |
Annealed 248 HB max
Heat Treatment
| Soft Annealing | Cooling | Stress Relieving | Carburizing | Case Hardening | Quenching | Hardness after quenching HRC |
|---|---|---|---|---|---|---|
| 650°-700°C | Furnace | 610°-690°C | Pack, salt or gas carburize at 880°-980°C | 780°-820°C | Air, oil, salt bath 650°-700°C | 60 |
Tempering °C
| Tempering°C | 100 | 200 | 300 | 400 | 500 | 600 | 700 |
|---|---|---|---|---|---|---|---|
| HRC | 60 | 52 | 52 | 54 | 56 | 50 | 32 |