DIN 20CrMo5
20CrMo5 has a high content of alloy elements, mainly including corrosion resistant steel, heat resistant steel, wear-resistant steel and other special steels with physical and chemical properties. The mechanical properties of alloy structural steel are better than that of carbon structural steel, especially the heat treatment properties. It is commonly used in marine, shipping, food, paper mills, oil fields, aerospace and other industries.
Designation by Standards
| Brand Name | Ravne No. | Mat. No. | DIN | EN | AISI |
| ECMO100 | 721 | 1.7264 | 20CrMo5 | - | - |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.21 | 0.25 | 1.05 | 1.25 | 0.25 | - | - | - | - |
Applications
Higher stressed components – gears, shafts, crankshafts, connecting rods, cam shafts, etc.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.80
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC |
| 11.1 | 12.1 | 12.7 | 12.9 | 13.5 |
Soft Annealing
Heat to 680-700oC, cool slowly. This will produce a maximum Brinell hardness of 217.
Carburizing
Temperature: 880-950oC. Cooling from carburizing temperature: oil (water), air, thermal bath, cooling box.
Hardening
Core hardening temperature: 850-880oC. Case hardening temperature: 810-840oC. Quenching media: oil, (water), thermal bath.
Tempering
Tempering temperature: 170-210oC.
Forging
Hot forming temperature: 1050-850oC.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as it become available.
