Tp347 ƙarfe ne mai kama da bakin ƙarfe mai kama da austenitic wanda aka daidaita shi da columbium. Ƙara columbium yana sa wannan matakin bakin ƙarfe ya zama cikakke a yanayin iskar shaka mai ƙarfi a ƙarƙashin yanayin zafi mai yawa a kusan digiri 800 na Celsius.
TP347H (UNS S3409) shine matakin ƙarfe na bakin ƙarfe na TP347 tare da babban abun ciki na carbon (0.04 - 0.10)
347H yana da kyakkyawan juriya ga tsatsa tsakanin granular, kuma yana da kyakkyawan juriya ga tsatsa a cikin alkali, ruwan teku da kuma nau'ikan maganin acid daban-daban. Saboda kyakkyawan juriyarsa ga zafi da juriya ga iskar shaka, yana iya jure ƙananan kaya a yanayin zafi ƙasa da digiri 850.
Darajan Tube:TP347, AISI 347, EN 1.4550, UNS S34700
Nau'in Bututu:Ba shi da sumul
Tsarin Bututu:Madaidaiciya, Lanƙwasa U, Guda-zuwa-Tsawon Yanka
Ƙarshen Fuskar:Maganin da aka yi wa ado da kuma aka yi wa ado (AP), Mai haske (BA), Mai gogewa