ASTM A176 Type 422 Introduce
ASTM A176 Type 422 is a chromium-molybdenum-tungsten alloy steel with exceptional weldability. It is a non-magnetic material that is ideal for a wide range of high-temperature applications. ASTM A176 Type 422 has good thermal resistance and high strength to weight ratio. It has excellent formability and machinability, as well as a good resistance to stress corrosion cracking. It is ideal for a wide range of applications such as components and parts used in the automobile and heavy truck industries, as well as heat treat furnaces, pressure vessels, gas turbines, and industrial valves. ASTM A176 Type 422 has also been used in military applications such as armor plating and missile components.
Smelting temperature:1275°C - 1745°C
Application:Stainless steel and heat-resistant chrome steel, sheet and strip
ASTM A176 Type 422 Material Mechanical Properties
The mechanical properties of the ASTM A176 Type 422 steel are as follows:
| YieldRp0.2 | ≤ 432 (MPa) |
| TeileRm | ≤ 447 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 321 |
ASTM A176 Type 422 Material Thermal Properties
The thermal performance parameters of the ASTM A176 Type 422 steel are as follows:
| Temperature (°C) | 41 | 297 | 264 |
| Modulus of elasticity (GPa) | - | 241 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 12.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 124 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 241 |
| Poisson’s coefficient, ν | - | - | 243 |