G20CrNi2Mo Steel

G20CrNi2Mo, tensile strength is σb (MPa): ≥ 980 (100), 

Elongation is δ 5 (%): ≥ 13,
And the reduction of area is ψ (%): ≥ 45

G20CrNi2Mo is a rolling bearing steel implementation standard: GB/T 3203-1982; corresponding to the US brand 4320H implementation standard ASTM A534-04; Japanese brand SNCM420 implementation standard JIS G4053-2008; German grade 20NiCrMo7 implementation standard EN ISO 683/17- 1999.

G20CrNi2Mo Chemical Composition

C: 0.17~0.23
Si: 0.15~0.40
Mn: 0.40~0.70
Cr: 0.35~0.65
Ni: 1.60~2.00
Mo: 0.20~0.30
Cu: ≤0.25
P: ≤0.030
S: ≤0.030 

G20CrNi2Mo Mechanical Property

Impact toughness value αkv (J/cm2): ≥78(8)
Specimen size: sample size is 25mm

G20CrNi2Mo Heat treatment specification and metallographic structure:

Heat treatment specification: quenching, first time 880±20°C, second time 800±20°C, oil cooling; tempering, 150~200°C, air cooling.
Metallographic structure: the carburized layer is high carbon martensite. The heart is low carbon martensite.

G20CrNi2Mo Steel Features and scope of application:

G20CrNi2Mo is a commonly used alloy carburized steel. After carburizing treatment, the surface has quite high hardness, wear resistance and contact fatigue strength. At the same time, the core still retains good toughness and can withstand high impact load. G20CrNi2Mo steel is mainly used for impact-resistant and wear-resistant parts such as railway bearings.