ASTM A479/A479M S31254 Introduce
The primary application of ASTM A479/A479M S31254 pressure vessel steel is in the manufacturing of pressure vessels, which are containers designed to hold liquids or gases at high pressures. These vessels are commonly used in industries such as oil and gas, chemical processing, and power generation.
Smelting temperature:1892°C - 1538°C
Application:Stainless steel and heat-resistant steel bars and profiles for boilers and pressure vessels
ASTM A479/A479M S31254 Material Chemical Composition
The chemical composition of the ASTM A479/A479M S31254 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.8000 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | 17.5000 | 18.5000 |
| Nitrogen (N) | 0.1800 | 0.2200 |
| Molybdenum (Mo) | 6.0000 | 6.5000 |
| Manganese (Mn) | - | 1.0000 |
| Copper (Cu) | 0.5000 | 1.0000 |
| Chromium (Cr) | 19.5000 | 20.5000 |
| Carbon (C) | - | 0.0200 |
ASTM A479/A479M S31254 Material Mechanical Properties
The mechanical properties of the ASTM A479/A479M S31254 steel are as follows:
| YieldRp0.2 | ≤ 168 (MPa) |
| TeileRm | ≤ 159 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
ASTM A479/A479M S31254 Material Thermal Properties
The thermal performance parameters of the ASTM A479/A479M S31254 steel are as follows:
| Temperature (°C) | 12 | 346 | 542 |
| Modulus of elasticity (GPa) | - | 132 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 321 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 332 |
| Poisson’s coefficient, ν | - | - | 422 |