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Super Duplex Stainless Steel
A high-performance duplex stainless steel with PREN greater than 40, offering exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing environments.
What is Super Duplex?
Super duplex stainless steels are an advanced subset of duplex alloys with enhanced corrosion resistance, characterized by PREN values exceeding 40. They are designed for the most demanding environments, particularly offshore oil & gas and seawater applications.
Key Grades
- UNS S32750 (2507) — 25% Cr, 7% Ni, 4% Mo
- UNS S32760 — With tungsten addition
- UNS S39274 — High nitrogen super duplex