OCR4ES
  
Identification

 

Designation by Standards
Brand Name Ravne No. Mat. No. DIN EN AISI
OCR4ES 810 1.3505 100Cr6 100Cr6 5210

 

Chemical Composition

 

Chemical Composition in Weight %
C Si Mn Cr Mo Ni V W Others
0.97 0.25 0.35 1.50 - max. 0.30- - - Cu max. 0.30

 

General Information

Description
52100 is a high carbon, chromium containing low alloy steel that is through hardening and noted in particular for use as bearings.

Applications
Principal applications are those for bearings in rotating machinery. Balls, rollers and rings for roller bearings, diameter up to 30 mm.

 

Properties


Physical properties (avarage values) at ambient temperature:
Modulus of elasticity [103 x N/mm2]: 190-210
Density [g/cm3]: 7.83
Thermal conductivity [W/m.K]: 20.0
Electric resistivity [Ohm mm2/m]: 0.65
Specific heat capacity[J/g.K]: 0.46
 

Heat Treatment

Soft Annealing
Heat to 760-800 'C, cool slowly in furnace. This will produce a maximum Brinell hardness of 207.

Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to 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 830-870 'C followed by oil quenching. Hardness after quenching is 64 HRC.

Tempering
Tempering temperature: 150-180 'C.

 

Workability


Forging
Hot forming temperature: 1200-926 'C.

Machinability
Machinability of 52100 alloy is good by conventional methods. A spherodizing anneal at 1200 F before machining will improve the overall machinability of the alloy.