CRV2
  
Identification

 

Designation by Standards
Brand Name Ravne No. Mat. No. DIN EN AISI
CRV2 837 1.2631 X50CrMoW9-1-1 - -

 

Chemical Composition

 

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 -

 

General Information

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.

 

Properties

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
20-100�C 20-200�C 20-300�C 20-400�C 20-500�C 20-600�C 20-700�C 20-800�C
9.8 10.2 10.5 11.3 11.9 12.4 12.8 13.0

Continuous Cooling Transformation (CCT) Diagram

Heat Treatment

Soft Annealing
Heat to 820-870�C, 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. 650�C, 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 1020-1050�C followed by oil, air or warm bath (approx. 400�C.) quenching. Hardness after quenching is 61 HRC.

Tempering
Tempering temperature: 150-400�C

Tempering Temperature (�C) vs. Hardness (HRC)
100�C 200�C 300�C 400�C 500�C 525�C 550�C 575�C 600�C 700�C
60 57 56 56 59 59 53 48 43 33

Effect of Tempering Temperature on Hardness

 

Workability


Forging
Hot forming temperature: 1050-900�C.

Machinability
No data.