ASTM A479/A479M 304N Introduce
The mechanical properties of ASTM A479/A479M 304N boiler steel depend on the grade and the heat treatment used during manufacturing. Generally, the higher the grade, the greater the strength and resistance to deformation and failure under high temperatures and pressures.
The primary application of ASTM A479/A479M 304N boiler steel is in the manufacturing of boilers, which are pressure vessels used to generate steam or heat water for industrial processes. Boilers are commonly used in industries such as power generation, chemical processing, and food processing.
Smelting temperature:1218°C - 1287°C
Application:Stainless steel and heat-resistant steel bars and profiles for boilers and pressure vessels
ASTM A479/A479M 304N Material Chemical Composition
The chemical composition of the ASTM A479/A479M 304N steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 8.0000 | 12.0000 |
| Nitrogen (N) | 0.1000 | 0.1600 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 18.0000 | 20.0000 |
| Carbon (C) | - | 0.0800 |
ASTM A479/A479M 304N Material Mechanical Properties
The mechanical properties of the ASTM A479/A479M 304N steel are as follows:
| YieldRp0.2 | ≤ 479 (MPa) |
| TeileRm | ≤ 947 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 424 |
ASTM A479/A479M 304N Material Thermal Properties
The thermal performance parameters of the ASTM A479/A479M 304N steel are as follows:
| Temperature (°C) | 44 | 487 | 474 |
| Modulus of elasticity (GPa) | - | 544 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 121 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 322 |