How does duplex stainless steel resist stress corrosion cracking?
Duplex stainless steels contain roughly 50% austenite and 50% ferrite. Ferrite is inherently much more resistant to chloride-induced SCC than austenite whereas Austenite provides toughness and ductility, helping prevent brittle cracking.
Compared with fully austenitic stainless steels, it has lower nickel content which helps to lower SCC susceptibility.
