SAE J438 W310 Introduce
SAE J438 W310 is one of the most popular materials used in engineering and construction due to its strength, cost-effectiveness and array of beneficial properties. SAE J438 is a popular steel grade in the Internal Standard, Society of Automotive Engineers (SAE). This steel grade is specified for bearings, bushings, and components used in high temperature applications. It has superior thermal properties than mild or low carbon steel and is often used for high temperature applications including aircraft and automotive parts.
Smelting temperature:1362°C - 1444°C
Application:Tool and die steels
SAE J438 W310 Material Chemical Composition
The chemical composition of the SAE J438 W310 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | 0.3500 | 0.5000 |
| Silicon (Si) | - | 0.3500 |
| (Mn+Si+Cr) | - | 0.7500 |
| Manganese (Mn) | - | 0.3500 |
| Chromium (Cr) | - | 0.1500 |
| Carbon (C) | 0.9500 | 1.1000 |
SAE J438 W310 Material Mechanical Properties
The mechanical properties of the SAE J438 W310 steel are as follows:
| YieldRp0.2 | ≤ 936 (MPa) |
| TeileRm | ≤ 584 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 213 |
SAE J438 W310 Material Thermal Properties
The thermal performance parameters of the SAE J438 W310 steel are as follows:
| Temperature (°C) | 21 | 526 | 159 |
| Modulus of elasticity (GPa) | - | 768 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 312 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 234 |
| Poisson’s coefficient, ν | - | - | 312 |