Stainless Steel
Austenitic 309/309S/309H

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Specifications (ASTM/ASME)
Alloy UNS Designation Material
Specification
Tubing
Specification
Pipe
Specification
309/309S1 S30900/S309081 A 240/SA-240 A 249/SA-249 A 312/SA-312
      A 554 ---
309H S30909 A 240/SA-240 A 249/SA-249 A 312/SA-312

1 Supplied as dual certified material.

Chemical Composition (%)
Alloy 309 309S 309H
UNS Designation S30900 S30908 S30909
Carbon (C)  0.2 max. 0.08 max. 0.04 - 0.10
Manganese (Mn) max. 2.00 2.00 2.00
Phosphorus (P) max. 0.045 0.045 0.045
Sulfur (S) max. 0.030 0.030 0.030
Silicon (Si) max. 0.75 0.75 0.75
Chromium (Cr) 22.0 - 24.0 22.0 - 24.0 22.0 - 24.0
Nickel (Ni) 12.0 - 15.0 12.0 - 15.0 12.0 - 15.0
Molybdenum (Mo) max. --- 0.75 ---
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)
309 S30900 --- --- --- --- ---
309S S30908 75,000 515 30,000 205 35
309H S30909 75,000 515 30,000 205 35

 

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