Duplex 2205

Stainless Steel Duplex 2205 is the most widely used duplex (ferritic/austenitic) stainless steel grade. It finds applications due to both excellent corrosion resistance and high strength. Duplex 2205 is a nitrogen enhanced stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels.Duplex Steel 2205 is not generally suitable for use at temperatures above 300°C as it suffers from precipitation of brittle micro-constituents, nor below -50°C because of its ductile-to-brittle-transition.

Chemical Composition

	Duplex 2205
Ni	4.5 – 6.5
Fe	Balance
Cr	22 – 23
Mo	3 – 3.5
C	0.030 max
Mn	2.0 max
Si	1 max
P	0.030 max
N	0.14 – 0.2
S	0.02 max

Specifications

Standard	Duplex 2205
UNS	S31803 / S32205
Werkstoff Nr.	1.4462

Mechanical & Physical Properties

Density	7.8 g/cm3
Melting Point	1440 °C (2625 °F)
Tensile Strength	Psi – 90000 , MPa – 620
Yield Strength (0.2%Offset)	Psi – 65000 , MPa – 450
Elongation	30 %