Designation by Standards

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

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

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.

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

Soft Annealing
Heat to 760-800^oC, 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^oC, 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^oC followed by oil quenching. Hardness after quenching is 64 HRC.

Tempering
Tempering temperature: 150-180^oC.

Forging
Hot forming temperature: 1200-926^oC.

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.

Welding
This is a high carbon alloy typically used in bearing applications where welding is not applicable or appropriate.

Forms manufactured: Please see the Dimensional Sales Program.

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 the become available.

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