904l bakin karfe farantin karfe ne superaustenitic bakin karfe wanda aka halitta don matsakaici zuwa high lalata juriya a cikin fadi da kewayon yanayi.Cakuda na chromium da abun ciki na nickel, tare da ƙari na molybdenum da jan karfe suna ba da kyakkyawan juriya na lalata.Saboda nickel 25% da molybdenum 4.5%, ASTM B625 UNS N08904 yana ba da kyakkyawan juriya na chloride danniya lalata juriya, pitting da juriya na lalata gabaɗaya waɗanda suke da inganci. zuwa 316L da 317L.Yana haɓakawa don fita wuraren da ke ɗauke da acid sulfuric acid.904l bakin karfe farantin karfe yana da kyau juriya ga inorganic acid kamar zafi phosphoric acid.Ana iya walda shi cikin sauƙi da sarrafa shi ta daidaitaccen tsari na ƙirƙira.ss 904l farantin ne quite ductile kuma za a iya sauƙi kafa.Ƙarin molybdenum da nitrogen yana ba da ƙarin kayan aiki masu ƙarfi kuma yana iya zama dole idan aka kwatanta da daidaitattun maki 304/304L.Astm A240 nau'in 904l yana da kyakkyawan juriya ga ruwan teku mai dumi da harin chloride.Babban juriya da shi yana adawa da lalata lalatawar danniya kuma saboda kasancewar yawan nickel a cikin abun da ke ciki.Bugu da ƙari, ƙari na jan ƙarfe yana haɓaka juriya ga sulfuric acid da sauran wakilai masu ragewa a cikin yanayi mai tsanani da m.1.4539 kayan farantin karfe, yana ba da juriya mai kyau.Koyaya, kwanciyar hankali na tsarin wannan matakin yana rushewa a yanayin zafi mai girma, musamman sama da 400 ° C.ASTM A240 UNS N08904 abu na iya zama maganin zafi mai zafi a 1090 zuwa 1175°C ta hanyar saurin sanyaya.Maganin thermal ya dace da taurinsa.1.4539 manyan aikace-aikacen takarda sune kayan aikin matatar mai, masana'antar sarrafa takarda da masana'anta, masana'antar goge gas, da sauransu.
