A new super austenitic stainless steel has been developed for use in highly corrosive wet environments. The new alloy, Alloy 35Mo, has the general chemical composition 27Cr-35Ni-6.5Mo-0.28N and PRE>52, suggesting high resistance towards chloride induced localized corrosion. The Alloy 35Mo has excellent corrosion resistance in chloride bearing environments, and has also shown surprising mechanical properties with a combination of high yield strength, excellent ductility and low hardness. The main applications for the new grade will initially be heat exchanger tubing, small dimension piping and hydraulic & instrumentation tubing. Target industries are refineries, chemical and petrochemical plants and off- shore installations. This paper discusses Alloy35Mo, its properties, and a comparison with existing, competing grades.

Subject
New alloys, Test methods, Materials, Corrosion resistant alloys, Stainless alloys, Nickel based alloys, Tubes, Mechanical properties, Commercial alloys, Crevice corrosion, Pitting, Alloys, Ductility
Keywords:
Stainless, PRE, pitting corrosion, crevice corrosion, ductility
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2019
Association for Materials Protection and Performance (AMPP)
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