Türkçe40CrMnMo7/AISI: P20
| Chemical Composition (%) | C | Mn | Cr | Mo |
| % Average | 0,40 | 1,50 | 1,90 | 0,20 |
| DIN Analysis | 0,35-0,45 | 1,30-1,60 | 1,80-2,10 | 0,15-0,25 |
| Thermal Conductivity ( W/ m.K ) | 100°C | 200°C | 300°C |
| 34,0 | 33,6 | 31,9 |
| HEAT TREATMENT | |||
| Tempature(°C) | Time (Hour) | Cooling Environment | |
| Soft Annealing | 700-75 | 2-5* | Furnace |
| Stress Relief Annealing | 550-650 | 2* | Furnace |
| Hardening | 830-870 | - | Oil, Hot bath 180-220°C |
| Tempering | 600-680 | 1 hour for every 20 mm | Air |
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