austenitic stainless steel

UNS S34565 is a fully austenitic stainless steel which features both - high strength and excellent corrosion resistance in a wide range of corrosive media. It was originally developed for applications in chloride containing environments and especially sea-water. The high nitrogen content ensures the stable austenitic structure, the high strength and the outstanding pitting and crevice corrosion resistance even in the as-welded conditions. UNS S34565 is recommended for use especially in equipment for the chemical industries. Its resistance to chloride induced pitting and crevice corrosion enables it to be used successfully in the production and transport of oil and gas on on-shore and off-shores facilities. Because of outstanding corrosion resistance it is very suitable for applications in flue gas desulphurisation (FGD) systems and other environmental technologies.Corrosion BehaviourThe primary intention in developing UNS S34565 was to provide a material with excellent resistance to chloride induced pitting and crevice corrosion. The chromium and molybdenum contents and the high nitrogen content results in a Pitting Index of 52, which is considered as a measure for the resistance to pitting corrosion