What is the GCr15 steel?

GCr15 round steel is used to manufacture rolling bearing balls, rollers and sleeves. It can also be used to make precision measuring tools, cold punching dies, machine tool screws and precision parts of diesel oil pumps.

GCr15 steel is a kind of high carbon chromium bearing steel with less alloy content, good performance and the most widely used. After quenching and tempering, it has high and uniform hardness, good wear resistance, and high contact fatigue performance. The steel has medium cold working plasticity, general cutting performance, poor welding performance, high sensitivity to the formation of white spots, and temper brittleness.

Chemical composition (%)

C: 0.95-1.05, Mn: 0.20-0.40, Si: 0.15-0.35, S: <=0.020, P: <=0.027, Cr: 1.30-1.65

GCr15 round steel characteristics: good overall performance. After spheroidizing annealing, it has good cutting performance. After quenching and tempering, the hardness is high and uniform, and the wear resistance and contact fatigue strength are high. The thermal processing performance is good.

GCR15 round steel is the most used and produced brand among high-carbon chromium bearing steels.

GCr15 round steel use: this steel is mainly used to make various bearing rings and rolling elements. For example: making internal combustion engines, electric locomotives, automobiles, tractors, machine tools, rolling mills, drilling machines, mining machinery, general machinery, and high-speed rotating high loads Steel balls, rollers and rings of mechanical transmission bearings.