First, contact fatigue strength
Bearing under the action of periodic load, the contact surface is very easy to attack fatigue damage, that is, the emergence of cracks and spalling, which is an important failure of the bearing. Therefore, in order to improve the service life of bearings, bearing steel must have a high contact fatigue strength.

Second, wear resistance
During the bearing task, not only rolling friction occurs between the ring, the rolling body and the maintenance frame, but also sliding friction occurs, so that the bearing parts are constantly worn. In order to increase the wear of bearing parts, maintain the stability of bearing accuracy, and extend the service life, bearing steel should have good wear resistance.

Third, hardness
Hardness is one of the important qualities of bearing quality, which has indirect influence on contact fatigue strength, wear resistance and elastic limit. The hardness of bearing steel in the use of individual to reach HRC61~65, the ability to make the bearing obtain high contact fatigue strength and wear resistance.

Four, rust resistance
In order to avoid bearing parts and finished products being eroded and rusted during processing, storage and use, bearing steel should have good anti-rust properties.

5. Processing performance
Bearing parts in the consumption process, to go through many cold, hot processing processes, in order to meet the requirements of a small amount, high efficiency, high quality, bearing steel should have good processing performance. For example, cold and hot forming performance, cutting performance, hardenability and so on.