ASTM A213/A213M Type 444 Introduce
ASTM A213/A213M Type 444 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 444 steel is characterised by high strength, excellent corrosion resistance and watertight weldability.
Smelting temperature:1885°C - 1186°C
Application:Seamless ferritic and austenitic alloy steel boilers, superheaters and heat exchanger tubes
ASTM A213/A213M Type 444 Material Chemical Composition
The chemical composition of the ASTM A213/A213M Type 444 steel are as follows:
Element | Min | Max |
---|---|---|
Nitrogen (N) | - | 0.0350 |
Molybdenum (Mo) | 1.7500 | 2.5000 |
Chromium (Cr) | 17.5000 | 19.5000 |
PhOsphorus (P) | - | 0.0400 |
Sulfur (S) | - | 0.0300 |
Manganese (Mn) | - | 1.0000 |
Silicon (Si) | - | 1.0000 |
Carbon (C) | - | 0.0300 |
(Ti+Nb) | - | 0.8000 |
(Ni+Cu) | - | 1.0000 |
Nitrogen (N) | - | 0.0350 |
ASTM A213/A213M Type 444 Material Mechanical Properties
The mechanical properties of the ASTM A213/A213M Type 444 steel are as follows:
YieldRp0.2 | ≤ 887 (MPa) |
TeileRm | ≤ 548 (MPa) |
ImpactKV/Ku | 33(J) |
ElongationA | 42% |
Reduction in cross section on fractureZ | 22% |
As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
Brinell hardness (HBW) | 431 |
ASTM A213/A213M Type 444 Material Thermal Properties
The thermal performance parameters of the ASTM A213/A213M Type 444 steel are as follows:
Temperature (°C) | 44 | 648 | 383 |
Modulus of elasticity (GPa) | - | 313 | - |
Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
Thermal conductivity (W/m·°C) | - | 43.3 | 13.2 |
Specific thermal capacity (J/kg·°C) | - | 213 | - |
Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
Deity (kg/dm³) | - | - | 142 |
Poisson’s coefficient, ν | - | - | 424 |