SAE J438 W109 Introduce
SAE J438 W109 is composed of an alloy of iron and carbon with a few other elements. The physical properties of steel include its strength, density, malleability and ductility. It is of particular interest due to its superior thermodynamic properties when compared to mild and low carbon steel. This higher strength makes it ideal for use in higher temperature conditions. Due to its superior thermal properties, SAE J438 W109 is used in a variety of applications including aircraft and automotive parts. The high temperature stability of SAE J438 W109 makes it ideal for use in the construction of valves, sensors, shafts and bearing components. Its high temperature capability also makes it useful for the production of components for jet engines and aircraft turbines. This steel grade is also used in medical devices and amplifiers due to its excellent acoustic properties.
Smelting temperature:1374°C - 1688°C
Application:Tool and die steels
SAE J438 W109 Material Mechanical Properties
The mechanical properties of the SAE J438 W109 steel are as follows:
| YieldRp0.2 | ≤ 777 (MPa) |
| TeileRm | ≤ 972 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 213 |
SAE J438 W109 Material Thermal Properties
The thermal performance parameters of the SAE J438 W109 steel are as follows:
| Temperature (°C) | 21 | 222 | 576 |
| Modulus of elasticity (GPa) | - | 621 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 444 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 124 |
| Poisson’s coefficient, ν | - | - | 332 |