ASME SA-249/SA-249M TP304 Introduce
ASME SA-249/SA-249M TP304 is a popular alloy used in the oil and gas industry, engineering and other industrial applications. It is known for its reliable performance and its ability to resist corrosion. The chemical composition of this alloy affects its mechanical properties, particularly its weldability and tensile strength. Additionally, it can be heat-treated in order to increase its strength and corrosion resistance. due to its high chromium content, which can range from 12.5%-18.0%. In addition, the addition of nickel also increases corrosion resistance. This alloy also has good weldability, enabling the construction of structures that are immune to corrosion.
Smelting temperature:1278°C - 1727°C
Application:Welded austenitic steel tubes for boilers, superheaters, heat exchangers and condensers
ASME SA-249/SA-249M TP304 Material Chemical Composition
The chemical composition of the ASME SA-249/SA-249M TP304 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 8.0000 | 11.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 18.0000 | 20.0000 |
| Carbon (C) | - | 0.0800 |
ASME SA-249/SA-249M TP304 Material Mechanical Properties
The mechanical properties of the ASME SA-249/SA-249M TP304 steel are as follows:
| YieldRp0.2 | ≤ 982 (MPa) |
| TeileRm | ≤ 517 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 142 |
ASME SA-249/SA-249M TP304 Material Thermal Properties
The thermal performance parameters of the ASME SA-249/SA-249M TP304 steel are as follows:
| Temperature (°C) | 31 | 372 | 562 |
| Modulus of elasticity (GPa) | - | 677 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 434 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 413 |
| Poisson’s coefficient, ν | - | - | 333 |