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Duplex Stainless Steel Mechanical Properties
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Alloy
(UNS Designation)
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End Use
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Composition
nominal wt%
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Specifications
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Density
lb/in3 (g/cm3)
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Tensile
Strength
ksi. (MPa)
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0.2% Yield
Strength
ksi. (MPa)
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Elong-
ation %
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Hardness
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S82011
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Piping and tubing in general corrosion and chloride environments, structural components, storage tanks.
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C 0.03 max, Mn 2.0-3.0, Si 1.0 max, Cr 20.5-23.5, Ni 1.0-2.0, Mo 0.10-1.00, N 0.15-0.27, Fe Balance
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ASTM A240
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0.279
(7.75)
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101 min (sheet) / 95 min (plate)
(700 min (sheet) / 655 min (plate))
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75 min (sheet) / 65 min (plate)
(515 min (sheet) / 450 min (plate))
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30 min
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31 Rockwell C max
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S32003
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Piping, tubing in general corrosion and choride environments, architectural structures, roofing, topside applications on oil platforms
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C 0.03 max, Mn 2.0 max, Si 1.0 max, Cr 19.5-22.5, Ni 3.0-4.0, Mo 1.5-2.0, N 0.14-0.2, Fe Balance
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ASTM A240 ASME Code Case 2503
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0.279
(7.72)
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100 min (sheet) / 95 min (plate)
(690min (sheet) / 655 min (plate)
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70 min (sheet) / 65 min (plate)
(485 min (sheet) / 450 min (plate)
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25 min
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31 Rockwell C max
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2304 S3204
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Tanks, digesters, pressure vessels, pipes
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C 0.03 max, Mn 2.50 max, Si 1.0 max, Cr 21.5-24.5, Ni 3.0-5.5, Mo 0.05-0.60, Cu 0.05-0.60, N 0.05-0.20, Fe Balance
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ASTM A240, ASME SA-240, SAE J405
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0.280
(7.8)
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87 min
(600 min)
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58 min
(400 min)
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25 min
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32 Rockwell C max
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2205 S31803/S32205
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Pipe, Tubing in general corrosion and chloride stress corrosion environments
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C 0.03 max, Mn 2.0 max,Si 1.0 max, Ni 4.5-6.5, S31803: Cr 21.0-23.0, Mo 2.5-3.5, N 0.08-0.20, S32205: Cr 22.0-23.0, Mo 3.0-3.5, N 0.14-0.20, Fe Balance
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ASTM A240 ASME SA-240
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0.283
(7.82)
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90 min (31803) / 95 min (32205)
(620 min (31803) / 655 min (32205))
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65 min
(450 min)
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25 min
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31 RockwellC max
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255
S32550
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Pipe, containers for CPI, Oil & Gas
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C 0.04 max, Mn 1.5 max, P 0.04 max, S 0.03 max, Si 1.0 max, Cr 24.0-27.0, Ni 4.5-6.5, Mo 2.9-3.9, N 0.1-0.25, Cu 1.5-2.5, Fe Balance
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ASTM A240
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0.279
(7.73)
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110 min
(760 min)
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80 min
(550 min
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