S31803 ndiyo yakabatana nhamba yehurongwa (uns) dhizaini yeiyo yepakutanga dupplex simbi yesimbi isina tsvina. Iyo isina hurongwa yakagadzirwa nemapoka mazhinji ekutengeserana muma1970 ekuderedza kuvhiringidzika apo iyo fananidzo iyo yakafanana yainzi akasiyana zvinhu, uye zvinopesana. Simbi imwe neimwe inomiririrwa netsamba inoteverwa nenhamba shanu, uko tsamba inomiririra simbi simbi, i..E. s ye simbi isina tsvina.
Zvepamhepo zvigayo zvinyoronyoro zvinoda kuderera mavara ezvinyorwa zvisina kukodzera kurwisa kwakakwana. Zvichienderana ne 22% Chromium Zvemukati, ivo vane yakasanganiswa Austenitic: Ferritic micriticture iyo inopa simba rakakura, kurwisa uye kubhadhara-mutengo.
Iyo Uns S31803 (ASTM F51) Kufunga kwave kwakanyanya kusimbiswa neUND S32205 (1.4462, ASTM F60). Izvi zvinoratidza chishuvo chavo chekuwedzera zvinhu zveAlloy Corrosion, nekuda kwekuvandudzwa kweiyo Aod Steelmaking maitiro, inobvumira kudzora kwakasimba kwekuumbwa. Mukuwedzera, inobvumira kupesvedzera iyo nitrogen yekuwedzera nhanho pane kungova iripo seyakadzika chinhu. Naizvozvo, iyo yepamusoro-soro yekuita makomputa ezvinyorwa inotsvaga yekuwedzera izvo zvechromium (cr), molybdenum (mo) uye nitrogen (ma) nitrogen (m).