ASTM A213/A213M Type 348H Introduce
ASTM A213/A213M Type 348H steel is a ferritic and austenitic stainless steel that is widely used in many industrial applications including power generation, chemical, desalination and petrochemical plants. ASTM A213/A213M Type 348H steel is characterised by high strength, excellent corrosion resistance and watertight weldability.
Smelting temperature:1967°C - 1893°C
Application:Seamless ferritic and austenitic alloy steel boilers, superheaters and heat exchanger tubes
ASTM A213/A213M Type 348H Material Chemical Composition
The chemical composition of the ASTM A213/A213M Type 348H steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nickel (Ni) | 9.0000 | 13.0000 |
| Chromium (Cr) | 17.0000 | 20.0000 |
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0300 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 0.7500 |
| Carbon (C) | 0.0400 | 0.1000 |
| Tantalum (Ta) | - | 0.1000 |
| Silicon (Si) | - | 1.0000 |
| PhOsphorus (P) | - | 0.0450 |
| (Nb+Ta) | - | 1.1000 |
| Chromium (Cr) | 17.0000 | 19.0000 |
| Cobalt (Co) | - | 0.2000 |
ASTM A213/A213M Type 348H Material Mechanical Properties
The mechanical properties of the ASTM A213/A213M Type 348H steel are as follows:
| YieldRp0.2 | ≤ 383 (MPa) |
| TeileRm | ≤ 543 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 244 |
ASTM A213/A213M Type 348H Material Thermal Properties
The thermal performance parameters of the ASTM A213/A213M Type 348H steel are as follows:
| Temperature (°C) | 43 | 735 | 327 |
| Modulus of elasticity (GPa) | - | 141 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 343 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 322 |
| Poisson’s coefficient, ν | - | - | 113 |