Duplex 2205

ASTM StandardsBarButt Weld FittingsForgingsPipe, Welded & SeamlessTube, WeldedPlateA276, A479A815A182A790A789A240

Minimum Physical PropertiesTensile StrengthYield Strength90 KSI Min.65 KSI Min.

Chemical Composition (wt%)CMnPSSiNiCrFeMoN0.03 Max2.00 Max0.03 Max.0.02 Max.1.00 Max.4.50 – 6.5021.0 – 23.0Balance2.50 – 3.500.14 – 0.20

Properties

Duplex 2205 is a dual-phase stainless steel whose grain structure is about 45% ferritic and 55% austenitic, hence the name “duplex”. With twice the mechanical strength and corrosion resistance of common austenitics, 2205 offers some advantages over 316L and 317L:

* Lower coefficient of thermal expansion and a higher thermal conductivity * Resists chloride stress corrosion cracking * Pitting and crevice corrosion resistance * Excellent choice for high chloride environments * Lower cost than high alloyed austenitics

Applications

Industries taking advantage of the lower cost and higher mechanical properties of 2205 include:

* Heat exchangers * Marine construction * Oil and gas industry * Chemical processing