20CrMnTi gear steel for the carbon content of 0.17% -0.24% of the low-carbon steel. Automotive manufacturing multi-purpose transmission gear. Was in hardenability carburizing steels Cr Mn Ti steel, high hardenability, to ensure under quenching conditions, with high strength and toughness, especially those with high and low temperature impact toughness .20CrMnTi case hardened steel handle. good workability, especially small machining distortion, anti-fatigue performance is quite good.