Metal Materials Co., Ltd. Wuxi Xinbao to Main: steel, alloy pipe, bar, alloy steel, steel, alloy steel plate. 20crmnti chemical composition: Carbon C: 0.17 ~ 0.23 Si Si: 0.17 ~ 0.37 Manganese Mn: 0.80 ~ 1.10 Sulfur S: ≤ 0.035 to allow the residual content of phosphorus P: allow the residual content ≤ 0.035 Chromium Cr: 1.00 ~ 1.30 Ni: to allow the residual content ≤ 0.030 Copper Cu: ≤ 0.030 to allow the residual content of titanium Ti: 0.04 ~ mechanical properties 0.1020crmnti: Tensile strength σb (MPa): ≥ 1080 (110) Yield strength σs (MPa): ≥ 835 (85) Elongation δ5 ( %): ≥ 10 Reduction of area ψ (%): ≥ 45 Impact energy Akv (J): ≥ 55 Impact toughness values ??αkv (J/cm2): ≥ 69 (7) Hardness: ≤ 217HB Sample size: Sample blanks size 15mm20crmnti characteristics: belonging carburizing steel and quenched and tempered steel, heat deformation, surface wear resistance, high toughness of mind, is a very long use of steel, can replace 20simnb, 20mntib, 20crmnb such as steel. 20crmnti purposes: to create complex shapes, withstand high fatigue strength, high load large springs, manufacturing section of less than 30mm, withstand high-speed, medium or heavy nuclei as well as the important parts to withstand shock and friction, such as tractors, commonly used in the automotive manufacturing gear gear, ring gear, gear shaft and crosshead.