Stainless Steel
Ferritic 409

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Specifications (ASTM/ASME)
Alloy UNS Designation Material
Specification
Tubing
Specification
Pipe
Specification
409 S40910 A 240/SA-240 A 268/SA-268 ---
409 S40920 A 240/SA-240 A 268/SA-268 ---
409 S40930 A 240/SA-240 A 268/SA-268 ---
Chemical Composition (%)
Alloy 409 409 409
UNS Designation S40910 S40920 S40930
Carbon (C) max. 0.030 0.030 0.030
Manganese (Mn) max. 1.00 1.00 1.00
Phosphorus (P) max. 0.040 0.040 0.040
Sulfur (S) max. 0.020 0.020 0.020
Silicon (Si) max. 1.00 1.00 1.00
Chromium (Cr) 10.5 - 11.7 10.5 - 11.7 10.5 - 11.7
Nickel (Ni) max. 0.50 0.50 0.50
Nitrogen (N) max. 0.030 0.030 0.030
Titanium (Ti) 6 x (C + N) min., 0.50 max. 8 x (C + N) min., 0.15 - 0.50 0.05 max.
Columbium (Cb) max. 0.17 0.10 ---
Titanium (Ti) plus
Columbium (Cb)
--- --- 0.08 + 8 x (C + N) min., 0.75 max.
Iron (Fe) Balance Balance 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)
409 S40910 55,000 380 25,000 170 20
409 S40920 55,000 380 25,000 170 20
409 S40930 55,000 380 25,000 170 20

 

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