We are professional 20MnCr5 Forged/Forging Steel Round bars(1.7147,AISI 5120) factory from china
Alloyed case hardening steel for parts with a required core tensile strength of 1000 - 1300 N/mm² and good wearing resistance as boxes, piston bolts, spindles, camshafts, gears, shafts and other mechanical controlling parts.
Chemical Composition(%)
C | Mn | Si | P | S | Cr |
|---|
| 0.17-0.22 | 1.10-1.40 | 0.40 max | 0.035 max | 0.035 max | 1.00-1.30 |
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Mechanical Properties( T=20°C if not differently stated )
Heat treatment state | Diameter(mm) | Rm (Mpa) |
|---|
| QUENCHED AND TEMPERED | 16 max | 1200 min |
| QUENCHED AND TEMPERED | 16-40 | 1000 min |
| QUENCHED AND TEMPERED | 40-100 | 800 min |
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HEAT TREATMENT AND HOT PLASTIC DEFORMATION TEMPERATURES
- | TEMPERATURE ° C | Cooling Medium |
|---|
| Forging or hot rolling | 850-1100 | air |
| Normalizing | 840-870 | air |
| Soft Annealing | 650-700 | furnace 217HB max |
| Carburising | 880-980 | / |
| Core hardening | 860-900 | oil |
| Intermediate annealing | 650-700 | / |
| Case hardening | 780-820 | oil |
| Tempering | 150-200 | / |
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