SAE J438 W108 Introduce
The chemical composition of SAE J438 W108 is relatively simple but has very important implications for its strength and machinability. Manly, it contains up to 0.8% carbon, up to 1.0% silicon, up to 0.4% manganese, and up to 0.4% copper. The balance is made up of Iron and a small amount of other trace metals. Due to its simpler composition when compared to other steels, SAE J438 W108 is an economical choice for parts and components that need to be strong but don't require the more sophisticated properties of other steels. Its versatility makes it suitable for a variety of applications, including automotive and industrial parts, hand tools, and frames.
Smelting temperature:1513°C - 1454°C
Application:Tool and die steels
SAE J438 W108 Material Chemical Composition
The chemical composition of the SAE J438 W108 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| (Mn+Si+Cr) | - | 0.7500 |
| Manganese (Mn) | - | 0.3500 |
| Chromium (Cr) | - | 0.1500 |
| Carbon (C) | 0.7000 | 0.8500 |
SAE J438 W108 Material Mechanical Properties
The mechanical properties of the SAE J438 W108 steel are as follows:
| YieldRp0.2 | ≤ 619 (MPa) |
| TeileRm | ≤ 152 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 442 |
SAE J438 W108 Material Thermal Properties
The thermal performance parameters of the SAE J438 W108 steel are as follows:
| Temperature (°C) | 24 | 954 | 751 |
| Modulus of elasticity (GPa) | - | 277 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 443 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 421 |
| Poisson’s coefficient, ν | - | - | 141 |