Chemical composition:
Steel C Si Mn MoCr P CuS Ni G20CrNi2Mo0.17-0.230.15-0.400.40-0.700.20-0.300.35-0.650.0300.25 0.0301.60-2.00
● Mechanical Properties:
Tensile strength σb (MPa): ≥ 980 (100) Elongation δ5 (%): ≥ 13 Reduction of area ψ (%): ≥ 45 impact toughness αkv (J/cm2): ≥ 78 (8) sample size: Sample size is 25mm ● heat treatment and microstructure specifications:
Standard heat treatment: quenching, the first 880 ± 20 ℃, the second 800 ± 20 ℃, oil cooling; tempering, 150 ~ 200 ℃, air-cooled.
Microstructure: carburized layer of high carbon martensite. Department for low-carbon martensite heart.
● Features and application:
Is a commonly used alloy carburizing steel, carburizing treatment has a high surface hardness, wear resistance and contact fatigue strength, while the Department has retained a good heart toughness that can withstand high impact loads. Mainly for railway bearings impact resistant, wear parts.
● Application:
For the bearings to withstand high impact loads.
