S31803(2205,F51,DIN1.4462) is a ferritic-austenitic duplex stainless steel . It provides a valuable combination of high strength, excellent corrosion resistance and stress-corrosion cracking resistance as well as very good pitting resistance. In addition, it is highly resistant to stress and provides a low level of thermal expansion. These materials have a variety of applications that include heat exchangers, piping, pressure vessels, tanks, fans, rotors, pulp and paper production equipment, oilfield equipment and press rolls. Standard: ASTM A276, A479, A182. We offer the materials in form of stainless steel round rod, stainless steel square bar, stainless steel hexagon bar, stainless steel wire rod, stainless steel forging, stainless steel flat strip, stainless steel forging cylinder, stainless steel forging ring, stainless steel forging tube sheet.