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:

ElementMinMax
Nitrogen (N)-0.0350
Molybdenum (Mo)1.75002.5000
Chromium (Cr)17.500019.5000
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/Ku33(J)
ElongationA42%
Reduction in cross section on fractureZ22%
As-Heat-Treated ConditionSolution 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)44648383
Modulus of elasticity (GPa)-313-
Mean coefficient of thermal expaion ×10-6/(°C)--22
Thermal conductivity (W/m·°C)-43.313.2
Specific thermal capacity (J/kg·°C)-213-
Specific electrical resistivity (Ω mm²/m)0.13--
Deity (kg/dm³)--142
Poisson’s coefficient, ν--424