Duplex 2205

Duplex 2205

Duplex 2205 is a austenitic-ferritic stainless steel. Its high chromium, molybdenum, and nitrogen components provide higher strength and corrosion resistance when compared to 304 and 316 stainless. Products are supplied to meet ASTM, ASME, NACE, UNS and EN standards where appropriate. UNS S31803, UNS S32205.

Mechanical Properties* (in annealed condition) 

PropertiesUnit of MeasureDuplex 2205
UNS 31803
Duplex 2205
UNS 32205
Tensile Strengthksi90 min95 min
0.2% Yield Strengthksi65 min65 min
Elongation%25 min25 min
HardnessHV293 max293 max

*Nominal Room Temperature Mechanical Properties.  Typical Data.  Not suitable for design or specifications.


Element Duplex 2205
UNS 31803
Duplex 2205
UNS 32205
MnManganese2.000 max2.000 max
SiSilicon1.000 max1.000 max
PPhosphorus0.030 max0.030 max
CCarbon0.030 max0.030 max
SSulfur0.020 max0.020 max
NNitrogen0.200 max0.200 max