ASTM A213/A213M Type 309HNb Introduce
ASTM A213/A213M Type 309HNb 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 309HNb steel is characterised by high strength, excellent corrosion resistance and watertight weldability.
Smelting temperature:1151°C - 1761°C
Application:Seamless ferritic and austenitic alloy steel boilers, superheaters and heat exchanger tubes
ASTM A213/A213M Type 309HNb Material Chemical Composition
The chemical composition of the ASTM A213/A213M Type 309HNb steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | - | 0.7500 |
| Nickel (Ni) | 12.0000 | 16.0000 |
| Chromium (Cr) | 22.0000 | 24.0000 |
| PhOsphorus (P) | - | 0.0450 |
| Sulfur (S) | - | 0.0300 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 0.7500 |
| Carbon (C) | 0.0400 | 0.1000 |
ASTM A213/A213M Type 309HNb Material Mechanical Properties
The mechanical properties of the ASTM A213/A213M Type 309HNb steel are as follows:
| YieldRp0.2 | ≤ 727 (MPa) |
| TeileRm | ≤ 351 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 131 |
ASTM A213/A213M Type 309HNb Material Thermal Properties
The thermal performance parameters of the ASTM A213/A213M Type 309HNb steel are as follows:
| Temperature (°C) | 34 | 912 | 185 |
| Modulus of elasticity (GPa) | - | 729 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 32.2 |
| Specific thermal capacity (J/kg·°C) | - | 421 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 111 |
| Poisson’s coefficient, ν | - | - | 343 |