Duplex 2202, or DX2202, is an austenitic-ferritic stainless steel. It offers users general resistance to corrosion that is comparable to Type 304L. Some of the other key characteristics of Duplex 2202 include:
Improved mechanical strength
Service temperature range of -50 °C to 300°C
Stress corrosion resistance that is often double other austenitic stainless steels
Can be used in combination with nitric acid
Due to these and other benefits, Duplex 2202 is used in a wide variety of critical industrial application including:
Construction applications such as crash barriers and footbridges
Oil tanks
Automotive structure
Desalination
Pulp and Paper tanks
Juice tanks
Drinking water systems
In order for a stainless steel to qualify as Duplex 2202, it must have a certain chemical composition that includes:
Cr 23%
Ni 2.5%
Mn 1.30%
Mo <0.30%
N 0.20%
C 0.025% max
SSM supplies our customers with Duplex 2202 in a number of different forms including sheets, blanks, and strips. As with everything SSM sells, the Duplex 2202 complies with a number of different international standards including UNS and ASTM.
