24 July 2021 Ball Bearing Steel Bar
GCr15SiMo Ball Bearing Steel Bar
GCr15SiMo is an commen alloy bearing steel used to make bearings parts. The content of Si and Mn in GCr15SiMo steel is higher than ordinary bearing steel, in order to improve its hardenability and elastic limit, and make it have better wear resistance.
The applicable size range of rolling elements made of this kind of steel is larger. It is mainly used to manufacture bearing rings with wall thickness>12mm and outer diameter>280mm. Steel ball diameter>50mm; cone, cylindrical and spherical roller diameter>22mm and all sizes Of roller pins.
GCr15SiMo Chemical composition:
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) | Cu(%) |
|---|---|---|---|---|---|---|---|---|
| 0.95-1.05 | 0.65-0.85 | 0.20-0.40 | 0.027 | 0.02 | 1.40-1.70 | Max 0.30 | 0.30-0.40 | Max 0.25 |
GCr15SiMo mechanical properties:
| Tensile Strength Rp0.2(MPa) | Yield Strength Rm(MPa) | Impact energy KV(J) | Elongation at fracture A(%) | Reduction in cross section on fracture Z(%) | As-Heat-Treated Condition | Brinell hardness(HBW) |
|---|---|---|---|---|---|---|
| 584(≥) | 337(≥) | 14 | 22 | 31 | Solution and Aging,Annealing,Ausaging,Q+T,etc | 343 |
| Temperature (°C) | Modulus of elasticity (GPa) | Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) | Specific thermal capacity (J/kg·°C) | Specific electrical resistivity (Ω mm²/m) | Density (kg/dm³) | Poisson’s coefficient, ν |
|---|---|---|---|---|---|---|---|
| 22 | - | - | 0.21 | - | |||
| 488 | 399 | - | 22.3 | 412 | - | ||
| 111 | - | 13 | 24.2 | 214 | 122 |