Duplex Steel
High strength, marine & chemical. 3 grades with composition, properties and applications.
2205
The workhorse duplex stainless — a ~50/50 ferrite-austenite microstructure with roughly double the strength of 304/316 and superior chloride SCC resistance.
2304
Lean duplex stainless — a ~50/50 ferrite-austenite microstructure with roughly double the yield strength of 304/316, good chloride SCC resistance, and lower cost than Mo-bearing grades.
2507
Super duplex stainless — a dual-phase austenite + ferrite structure with PREN ≥40, delivering the highest pitting and crevice resistance among stainless steels for the most aggressive seawater and chloride service.
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