Why is S31254 called Alloy 254 stainless steel?
What is UNS S31254? This grade of steel is super austenitic stainless steel. They are high-end stainless steels designed for impact toughness against chloride crevice corrosion, stress corrosion cracking and pitting corrosion. These are austenites with high nickel and chromium content.
What is ASTM A240/A240M? It is an American material standard for standard specifications for chromium and chromium-nickel stainless steel plate, sheet, and strip for use in pressure vessels and general applications.
Why is S31254 called Alloy 254 stainless steel? When a material grade is designated stainless steel, it means it contains chromium, but this grade has a high chromium content. S31254 is a UNS designated alloy, also known as Alloy 254 in the SAE designation and defined in the ASTM A240 standard.
main feature:
High alloy addition means it has a Pitting Resistance Equivalency Number (PREN) ≥42
Excellent corrosion resistance in seawater and concentrated halide environments
High resistance to stress corrosion cracking
Resistant to seawater crevice corrosion
Good resistance to erosion and corrosion
Excellent ductility and impact strength at both ambient and sub-zero temperatures
Low magnetic permeability
application:
Urea production, organic and fatty acids, process industry equipment in environments with high halide concentrations
Oil and gas industry heat exchangers, pipes, valves and pumps
Power generation for flue gas desulfurization (FGD) applications
Marine and shipbuilding piping, pumps, valves and heat exchangers
Pipelines, condensers and other water treatment facilities in desalination plants
Pulp and paper processing in bleaching plants, barrels, drums, press rollers and pipes
