Koyo High Temperature Roller Bearings High temperature bearings, High-temperature bearing steelW\Cr\V\MoAnd so can form insoluble carbide at high temperatures, And the tempering time to disperse carbide precipitation, resulting in secondary hardening effect, so that a certain type of steel has a higher temperature, hardness, wear resistance, strong anti-oxidation performance, high fatigue resistance and dimensional stability. High-temperature bearing steel of which