GCr15 steel is an alloy content of less, with good performance, the most widely used high carbon chromium bearing steel. After quenching and tempering high hardness, uniform structure, good abrasion resistance, high contact fatigue performance. The steel cold plastic medium, generally cutting, welding performance is poor, the formation of white spots on the sensitivity can be large, with temper brittleness. Is actually Cr15. GCr15 bearing steel features: Good overall performance . Ball after annealing has good machinability high hardness after quenching and tempering and uniform , high wear resistance and contact fatigue strength . Thermal processing performance. Contain more alloying elements , the price is relatively cheap . GCr15 high carbon chromium bearing steel used in steel production and up grades , is widely used in the world , but the white point sensitivity, poor weldability. having a high and uniform hardness, good wear resistance. to bear a a small section of a large load and stress smaller pieces quenched large normalizing parts. has a bearing wear , it also strengthened the top steel . GCr15 bearing steel Uses: For the production of bearing rings and rolling elements such as : the production of high- load engine , motor vehicles, automobiles, tractors , machine tools, steel rolling machine, drilling machine , mining machinery, general machinery , and high-speed rotation mechanical transmission ball bearings , rollers and rings . except doing ball bearing rings endures, sometimes used to make tools, such as dies, measuring tools . GB/T 18254 GCr15 round bars chemical composition by %,maximum Grade C Si Mn Cr P S Mo Ni Cu GB/T 18254 GCr15 0.95-1.05 0.15-0.35 0.25-0.45 1.4-1.65 ≤0.025 ≤0.025 ≤0.1 ≤0.3 ≤0.25 GB/T 18254 GCr15 round bars mechanical properties Grade Delivery State Hardness, (annealing or tempering) HBW,max Forging ratio Grain Size (level) Nonmetal ratio GB/T 18254 GCr15 Hot rolled,forged,hot rolled (forged) balling annealing, hot rolled intenerating annealing, hot rolled intenerating annealing decorticating 179-207 ≥ 4:1 ≥ 6 ≤ 2.0
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