24 July 2021 Ball Bearing Steel Bar
G20CrNi2Mo Ball Bearing Steel Bar
G20CrNi2Mo is a rolling bearing steel implementation of the standard: GB / T 3203-1982; corresponding to the US brand 4320H implementation of standards ASTM A534-04; Japan brand SNCM420 implementation of the standard JIS G4053-2008; German brand 20NiCrMo7 implementation standards EN ISO 683 / 17- 1999; G20CrNi2Mo is a commonly used alloy carburized steel, carburized after the surface has a very high hardness, wear resistance and contact fatigue strength, while the heart also retains good toughness, can withstand high impact load. Mainly used for railway bearings and other impact-resistant, wear-resistant parts.
Chemical composition(mass fraction)(wt.%) of the G20CrNi2Mo:
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) | Cu(%) |
| 0.17-0.23 | 0.15-0.40 | 0.40-0.70 | 0.03 | 0.03 | 0.35-0.65 | 1.60-2.00 | 0.20-0.30 | Max 0.25 |
Chemical composition(mass fraction)(wt.%) of the G20CrNi2Mo:
| Yield Rp0.2(MPa) | Tensile Rm(MPa) | Impact KV (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | HBW |
| 398 (≥) | 713 (≥) | 21 | 43 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 342 |