Mat.No. 1.2631, DIN X50CrMoW9-1-1
Designation by Standards Mat. No. DIN EN AISI 1.2631 X50CrMoW9-1-1 - - Chemical Composition (in weight %) C Si Mn Cr Mo Ni V W Others 0.50 0.90 0.50 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 (...
Designation by Standards
Chemical Composition (in weight %)
Cold work tool steel. High toughness and resistance to dynamic loading.
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
Continuous Cooling Transformation (CCT) Diagram
Heat to 820-870oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 250.
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.
Harden from a temperature of 1020-1050oC followed by oil, air or warm bath (approx. 400oC.) quenching. Hardness after quenching is 61 HRC.
Tempering temperature: 150-400oC
Tempering Temperature (oC) vs. Hardness (HRC)
Hot forming temperature: 1050-900oC.
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 the become available.