2205 stainless steel (UNS S31803 and/or S32205),also known as Sandvik SAF 2205, is a Sandvik-owned trademark for duplex (ferritic-austenitic) stainless steel. Duplex SS2205 contains 22% chromium and 5% nickel which make it very corrosion resistant.

316L and 2205 are similar in some ways. 2205 can be regarded as increasing Cr content and reducing Ni content and fine-tuning other components on the basis of Austenitic 316L grade. 

Compared with 316L in the same application, the strength and corrosion resistance of SS 2205 tubes are greatly improved.The yield strength is about twice that of Austenitic stainless steels, when used as tubes,2205 tubes save weight and making the alloy more cost competitive when compared to 316L tubes.

Chemical composition comparison between 2205 and 316L (max) according ASTM A240>>

Physical property comparison between 2205 and 316L according ASTM A240>>

2205 Corresponding standards in different countries>>

2205 Stainless Steel pipe is  the most widely used duplex SS pipes grade and used in applications that require strength and good corrosion resistance and far superior to 316L.It’s an alternative to expensive 904L stainless steel owing to similar properties but cheaper ingredients.