KNOWLEDGE

Chrome Steel Gcr15 Features

chrome steel Gcr15

 

Chrome Steel Gcr15 Equivalents:

Chrome steel Gcr15 a high carbon chromium bearing steel with high hardenability, high & uniform hardness after heat treatment.
This material are widely used in bearing inner rings, outer rings, rollers and balls.

For Gcr15, its equivalents are as below,

EU USA Germany Japan France England Italy China Sweden Poland Russia
EN DIN,WNr JIS AFNOR BS UNI GB SS PN GOST
102Cr6 (1.2067) 52100 100Cr6 SUJ2 100Cr6 534A99 100Cr6 Cr2 2258 LH15 KH
100Cr6RR 535A99 GCr15 ShKh15

Chemical Composition:

For chrome steel Gcr15, its chemical composition is as below,

Chemical Composition %
Steel Grade C Si Mn Cr Mo ≤ Ni ≤ Cu ≤ P ≤ S ≤ Ca ≤ O ≤ Ti ≤ Al ≤ As ≤ As+Sn+Sb ≤ Pb ≤
GCr15 0.95-1.05 0.15-0.35 0.25-0.45 1.40-1.65 0.10 0.25 0.25 0.025 0.02 0.0012 0.005 0.05 0.04 0.075 0.002

Gcr15 Chrome Steel Features:

1. Contact fatigue strength
Under the action of periodic load, the linear bearing is prone to fatigue damage when contacting the surface, that is, cracks and peeling appear, which is an important damage situation of the linear bearing. Therefore, in order to improve the service life of bearings, bearing steel must have high contact fatigue strength.

2. Wear resistance
In the bearing task, not only rolling friction occurs between the ring, rolling element and the cage, but also sliding friction occurs, so that the linear bearing parts are constantly worn.
In order to increase the wear of linear bearing parts, maintain the accuracy and stability of the linear bearing, and extend the service life, bearing steel Gcr15 should have good wear resistance.

3. Hardness
Hardness is one of the important qualities of bearing quality, and it has an indirect influence on contact fatigue strength, wear resistance, and elastic limit. The hardness of the bearing steel under the operating conditions must reach HRC61~65, which enables bearings to achieve higher contact fatigue strength and wear resistance.

4. Anti-rust performance
In order to prevent bearing parts and finished products from being corroded and rusted during processing, storage and use, it is requested that the GCR15 bearing steel should have good rust resistance.

5. Processing performance
In the production process, bearing parts have to go through many cold and hot processing procedures. In order to meet the small quantity, high efficiency, and high quality requirements, the bearing steel should have good processing performance. For example, cold and hot forming performance, cutting performance, hardenability and so on.

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