Stainless Steel
Austenitic 304/304L/304H

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Specifications (ASTM/ASME)
Alloy UNS Designation Material
Specification
Tubing
Specification
Pipe
Specification
304/304L1 S30400/S304031 A 240/SA-240 A 249/SA-249 A 312/SA-312
      A 269 A 778
      A 270 ---
      A 554 ---
304H S30409 A 240/SA-240 A 249/SA-249 A 312/SA-312

1 Supplied as dual certified material.

Chemical Composition (%)
Alloy 304 304L 304H
UNS Designation S30400 S30403 S30409
Carbon (C)  0.08 max. 0.030 max.1 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) 17.5 - 19.5 17.5 - 19.5 18.0 - 20.0
Nickel (Ni) 8.0 - 10.5 8.0 - 12.0 8.0 - 10.5
Nitrogen (N) max. 0.10 0.10 ---
Iron (Fe) Balance Balance Balance

1 Maximum carbon content of 0.040% acceptable for drawn tubes.

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)
304 S30400 --- --- --- --- ---
304L S30403 70,000 485 25,000 170 35
304H S30409 75,000 515 30,000 205 35

 

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