GB GCr15 GB/T 18254 Introduction
GB GCr15 GB/T 18254 is one of the main products of our company. Other than offer high quality GCr15 with competitive price, we also help to resolve all kinds of doubts of clients. Such as GCr15 chemical composition, GCr15 properties,GCr15 yield strength, GCr15 tensile strength, GCr15 equivalent grades, etc. Meanwhile, we also do procesing for GB GCr15 GB/T 18254, including cutting, bending, welding, drilling, etc.
Application: High carbon chromium bearing steel.
Heat treated: 1376°C - 1691°C.
GB GCr15 GB/T 18254 Chemical Element
GB GCr15 GB/T 18254 in addition to carbon, steel also contains a small amount of manganese (Mn), silicon (Si), sulfur (S), phosphorus (P), oxygen (O), nitrogen (N) and hydrogen (H). These elements are not intentionally added to improve the quality of steel, but are brought in by ore and smelting process, so they are called impurity elements. These impurities have a certain impact on the properties of steel. In order to ensure the quality of steel, the chemical composition of all kinds of steel is strictly stipulated in technical standards.
The main elements proportion is as below:
| Element | Min | Max | Similar |
|---|---|---|---|
| Si | 0.1500 | 0.3500 | - |
| S | - | 0.0250 | - |
| P | - | 0.0250 | - |
| Ni | - | 0.3000 | - |
| Mo | - | 0.1000 | - |
| Mn | 0.2500 | 0.4500 | - |
| Cu | - | 0.2500 | - |
| Cr | 1.4000 | 1.6500 | - |
| C | 0.9500 | 1.0500 | - |
GB GCr15 GB/T 18254 Mechanical Properties
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 669 (≥) | 643 (≥) | 11 | 23 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 441 |
GB GCr15 GB/T 18254 Physical Properties
Physical performance parameters of GB GCr15 GB/T 18254 are mainly indicated by density, poisson's ratio, thermal conductivity, specific thermal capacity, coefficient of thermal expansion, modulus of elasticity, electrical resistance value, etc.
| 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 |
|---|---|---|---|---|---|---|---|
| 43 | - | - | 0.24 | - | |||
| 555 | 548 | - | 22.3 | 134 | - | ||
| 844 | - | 32 | 31.2 | 132 | 413 |
