Chemical composition：
C ：1.00-1.10
Ni+Cu ：≤0.50
The resistance of GB GCr9 GB/T 18254 to damage under load is called its mechanical properties. The mechanical properties of steel materials are the main basis for the design and material selection of parts. The mechanical properties of steel materials will be different with different loading properties (such as tension, compression, torsion, impact and cyclic loads). Common mechanical properties include strength, plasticity, hardness, impact toughness, multiple impact resistance and fatigue limit.
The mechanical properties of GB GCr9 GB/T 18254 is in line with GB/T 18254. The main properties as below:
|
|
|
|
|
As-Heat-Treated Condition |
Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
477 (≥) |
723 (≥) |
23 |
44 |
21 |
Solution and Aging, Annealing, Ausaging, Q+T,etc |
144 |
Physical properties of GB GCr9 GB/T 18254 are mainly indicated by modulus of electrical resistance value, thermal conductivity, specific thermal capacity, coefficient of thermal expansion, elasticity, poisson's ratio, density, 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 |
|---|---|---|---|---|---|---|---|
| 31 | - | - | 0.14 | - | |||
| 786 | 283 | - | 41.3 | 133 | - | ||
| 753 | - | 12 | 14.2 | 112 | 441 |
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