24 July 2021 Ball Bearing Steel Bar
G20Cr2Ni4 Ball Bearing Steel Bar
G20Cr2Ni4 bearing steel is a commonly used high-quality alloy carburized bearbing steel. After carburizing, the surface has high performance on hardness, wear resistance and contact fatigue strength. At the same time, the heart retains good toughness and can withstand high impact loads. Used to make bearings, can withstand strong impact loads, has medium weldability, has a tendency to temper brittleness, and is more sensitive to the formation of white spots.
Chemical Composition:
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) | Cu(%) |
|---|---|---|---|---|---|---|---|---|
| 0.17-0.23 | 0.15-0.40 | 0.30-0.60 | 0.03 | 0.03 | 1.25-1.75 | 3.25-3.75 | — | Max 0.25 |
Mechanical Properties:
| Tensile Rp0.2 (MPa) | Yield Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| ≥ 1175 | ≥ 835 | 78.5 | 10 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 223 |