ASTM A213/A213M Type 309H Introduce
ASTM A213/A213M Type 309H steel is a ferritic and austenitic stainless steel alloy that is produced and regulated to meet ASTM A213/A213M standard specification for seamless ferritic and austenitic stainless steel tubes for boilers, superheaters, and heat exchangers. This steel offers a combination of corrosion resistance, toughness and strength, making it well-suited for a wide range of industrial applications.
Smelting temperature:1368°C - 1121°C
Application:Seamless ferritic and austenitic alloy steel boilers, superheaters and heat exchanger tubes
ASTM A213/A213M Type 309H Material Chemical Composition
The chemical composition of the ASTM A213/A213M Type 309H steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nickel (Ni) | 12.0000 | 15.0000 |
| Chromium (Cr) | 22.0000 | 24.0000 |
| PhOsphorus (P) | - | 0.0450 |
| Sulfur (S) | - | 0.0300 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 1.0000 |
| Carbon (C) | 0.0400 | 0.1000 |
| Molybdenum (Mo) | - | 0.7500 |
| Silicon (Si) | - | 0.7500 |
ASTM A213/A213M Type 309H Material Mechanical Properties
The mechanical properties of the ASTM A213/A213M Type 309H steel are as follows:
| YieldRp0.2 | ≤ 869 (MPa) |
| TeileRm | ≤ 239 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 324 |
ASTM A213/A213M Type 309H Material Thermal Properties
The thermal performance parameters of the ASTM A213/A213M Type 309H steel are as follows:
| Temperature (°C) | 44 | 178 | 849 |
| Modulus of elasticity (GPa) | - | 299 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 333 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 343 |
| Poisson’s coefficient, ν | - | - | 411 |