Kalmar “alloy iron” yawanci tana nufin nau’in ƙarfe ne da gangan aka haɗa shi da wasu abubuwa don ƙirƙirar sabon abu mai takamaiman kaddarorin. akan ƙayyadaddun aikace-aikace da kaddarorin da ake so, amma abubuwan haɗakarwa na gama gari sun haɗa da carbon, chromium, nickel, manganese, molybdenum, da tungsten. juriya ga lalata abubuwa ne masu mahimmanci. Misalan samfuran baƙin ƙarfe sun haɗa da gears, bearings, sassa na inji, da kayan aiki.