ASTM A213/A213M Grade T22 Introduce
ASTM A213/A213M Grade T22 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 Grade T22 steel is characterised by high strength, excellent corrosion resistance and watertight weldability.
Smelting temperature:1251°C - 1225°C
Application:Seamless ferritic and austenitic alloy steel boilers, superheaters and heat exchanger tubes
ASTM A213/A213M Grade T22 Material Chemical Composition
The chemical composition of the ASTM A213/A213M Grade T22 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | 0.8700 | 1.1300 |
| Chromium (Cr) | 1.9000 | 2.6000 |
| PhOsphorus (P) | - | 0.0250 |
| Sulfur (S) | - | 0.0250 |
| Manganese (Mn) | 0.3000 | 0.6000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | 0.0500 | 0.1500 |
ASTM A213/A213M Grade T22 Material Mechanical Properties
The mechanical properties of the ASTM A213/A213M Grade T22 steel are as follows:
| YieldRp0.2 | ≤ 398 (MPa) |
| TeileRm | ≤ 931 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 234 |
ASTM A213/A213M Grade T22 Material Thermal Properties
The thermal performance parameters of the ASTM A213/A213M Grade T22 steel are as follows:
| Temperature (°C) | 12 | 477 | 631 |
| Modulus of elasticity (GPa) | - | 725 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 32.2 |
| Specific thermal capacity (J/kg·°C) | - | 323 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 444 |
| Poisson’s coefficient, ν | - | - | 211 |