Girman bakin karfe shine 7.7 g/cm³.Lokacin da aka yi amfani da bakin karfe a cikin matakai daban-daban a cikin masana'antu daban-daban, yana rage lokacin bayarwa da sassan da aka yi da bakin karfe ke ɗauka.Wannan shi ne saboda, sakamakon amfani da bakin karfe, babu buƙatar kammalawa.Bakin karfe yana da mafi girma ductility da mafi girma aiki hardening kudi.Bakin karfe yana da ƙarfin zafi mafi girma da taurin cryogenic.Bakin karfe yana samuwa a sama da maki 150, amma maki 15 ne kawai ake amfani da su.Babban abu mai girma game da bakin karfe shine cewa ana iya sake yin amfani da shi 100%.