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The basic properties of the rolling bearing on the material demand depends on the bearing performance.In general, the bearing steel should have the following properties:1. High contact fatigue strength.  2. High wear resistance.  3. High elastic limit and yield strength.  4. High and uniform hardness.  5. Certain impact toughness.  6. Good dimensional stability.  7. Good corrosion inhibition.  8. A good process performance.  For special work under the condition of bearing material, according to its specific requirements should also have its conditions appropriate to the special performance, such as: high temperature resistant, low temperature resistance, corrosion resistance, anti radiation, magnetic properties, etc.