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Rolling bearings are mainly composed of high carbon chromium bearing steel.High-carbon chromium bearing steel is also called fully hardenable steel with the same inside and outside hardness. It is widely used in many industries with bigger quantity, over 80% of the total material.
1.GCr15
Feature and application：It can be applied in many industries with big quantity in Martensite and bainite quenching.
Technical specification：Effective wall thickness under 26mm，extra light and narrow series less than 16mm，Quenching and tempering hardness HRC57~62.
2.GCr15SiMn
Feature and application：it can be applied in many industrial with big-size bearings in Martensite quenching.
Technical specification：effective wall thickness thicker than 26mm，extra light and narrow series more than 16mm，quenching and tempering hardness HRC57~62.
3.GCr18Mo
Feature and application：bainite steel, used in wear resistant occasion with bainite quenching.
Technical specification：effective wall thickness within 26~48mm, extra light and narrow series less than 16mm, quenching and tempering hardness HRC57~62,bainite is more wear than martensite, better for wear resistant occasion.