Designation by Standards
| Steel No. | DIN | EN | AISI | JIS | ГОСТ |
| 1.2631 | X50CrMoW9-1-1 | - | - | / | / |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.50 | 0.90 | 0.60 | 8.50 | 1.20 | - | - | 1.20 | - |
Description
Cold work tool steel. High toughness and resistance to dynamic loading.
Applications
Severely stressed machine blades for the cellulose, paper and fiberboard industries, flat-blade and circular blades for cutting 5 to 15 mm thick sheet/plate.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.80
Thermal conductivity [W/m.K]: 26.0
Electric resistivity [Ohm mm2/m]: 0.60
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC | 20-600oC | 20-700oC | 20-800oC |
| 9.8 | 10.2 | 10.5 | 11.3 | 11.9 | 12.4 | 12.8 | 13.0 |
Soft Annealing
Heat to 820-870oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 250.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 1020-1050oC followed by oil, air or warm bath (approx. 400oC.) quenching. Hardness after quenching is 61 HRC.
Tempering
Tempering temperature: 150-400oC
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC | 200oC | 300oC | 400oC | 500oC | 525oC | 550oC | 575oC | 600oC | 700oC |
| 60 | 57 | 56 | 56 | 59 | 59 | 53 | 48 | 43 | 33 |
Forging
Hot forming temperature: 1050-900oC.
Machinability
No data.
Remark
All technical information is for reference only.