Duplex Stainless Steels have a structure that contains both ferrite and austenite. Duplex alloys have higher strength and better stress corrosion cracking resistance than most austenitic alloys and greater toughness than ferritic alloys, especially at low temperatures. The corrosion resistance of duplex alloys depends primarily on their composition, especially the amount of chromium, molybdenum, and nitrogen they contain.

CHEMICAL COMPOSITION

UNS JIS En DIN S31803 QS2205 1.4462 X2CrNiMoN22-5-3 S32205 QS2205 1.4462 X2CrNiMoN22-5-3 S32304       S32750   1.4410 X2CrNiMoN25-7-4 S32760

MECHANICAL PROPERY

UNS Tensile Strength  Min, Mpa Yield Strength  Min, Mpa Elongation in 2INCH. Or 50mm Min, % Hardness Max,  HRC S31803 620 450 25 30 S32205 655 485 25 30 S32304 690 450 25 30 S32750 800 550 25 32 S32760 750 550 25 32

APPLIED STANDARD

ASTM A789/ASME SA789 , ASTM A790/ASME SA790, ASTM A312/ASME SA312, ASTM A240, EN10216-5, Conditions DIN17456, DIN17458, JIS G3459, JIS G3463, GOST 9941