ASTM A331 Grade 5140 Introduce
ASTM A331 Grade 5140 steel is an excellent grade of carbon steel thanks to its combination of mechanical and chemical properties. Its high strength and fatigue resistance make it an ideal material for electric motor components and rotating machinery, while its excellent heat resistance and corrosion resistance make it a great choice for aerospace and structural applications. For these reasons, ASTM A331 Grade 5140 steel is an ideal material for many industrial applications.
Smelting temperature:1967°C - 1549°C
Application:Cold rolled alloy steel rod
ASTM A331 Grade 5140 Material Chemical Composition
The chemical composition of the ASTM A331 Grade 5140 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Chromium (Cr) | 0.7000 | 0.9000 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | - | 0.0400 |
| Manganese (Mn) | 0.7000 | 0.9000 |
| Silicon (Si) | 0.1500 | 0.3500 |
| Carbon (C) | 0.3800 | 0.4300 |
ASTM A331 Grade 5140 Material Mechanical Properties
The mechanical properties of the ASTM A331 Grade 5140 steel are as follows:
| YieldRp0.2 | ≤ 142 (MPa) |
| TeileRm | ≤ 571 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 233 |
ASTM A331 Grade 5140 Material Thermal Properties
The thermal performance parameters of the ASTM A331 Grade 5140 steel are as follows:
| Temperature (°C) | 31 | 422 | 937 |
| Modulus of elasticity (GPa) | - | 982 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 123 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 222 |
| Poisson’s coefficient, ν | - | - | 222 |