Stainless Steel
Ferritic 444 (ASTM 18Cr-2Mo)

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Specifications (ASTM/ASME)
Alloy UNS Designation Material
Specification
Tubing
Specification
Pipe
Specification
444 (ASTM 18Cr-2Mo) S44400 A 240/SA-240 A 268/SA-268 ---
Chemical Composition (%)
Alloy 444 (ASTM 18Cr-2Mo)
UNS Designation S44400
Carbon (C) max. 0.025
Manganese (Mn) max. 1.00
Phosphorus (P) max. 0.040
Sulfur (S) max. 0.030
Silicon (Si) max. 1.00
Chromium (Cr) 17.5 - 19.5
Nickel (Ni) max. 1.00
Molybdenum (Mo) 1.75 - 2.50
Nitrogen (N) max. 0.035
Titanium (Ti) plus  Columbium (Cb) 0.20 + 4 x (C + N) min., 0.80 max.
Iron (Fe) Balance
Typical Physical & Mechanical Properties - Annealed Condition (Room Temperature)
Alloy UNS Designation Minimum Tensile Strength
Minimum Yield
Strength
0.2% Offset
Minimum Percent (%)
Elongation in
2 inches (50.8 mm)
(psi) (MPa) (psi) (MPa)
444 (ASTM 18Cr-2Mo) S44400 60,000 415 40,000 275 20

 

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