2205: A 22Cr duplex 2205 is a nitrogen alloyed (≥ 0.15%) austenitic - ferritic stainless steel with improved structure stability and high general, localised and stress corrosion resistance.  2205 with 22% Cr and 3% Mo additions, performs much better than 316L grade in almost all corrosive media. The yield strength is about twice that of austenitic stainless steels. This allows the designer to save weight and makes the alloy more cost competitive compared to 316L grade. Typical operation temperatures are - 50°C/+280°C (- 58°F/+536°F). Lower temperatures could be considered, but require additional precautions, in particular for welded structures. UR™ 2205 is a multi - purpose material which can be used in various corrosive media.