Insimbi ingenye yezinto ezisetshenziswa kakhulu ezingxenyeni zemishini yokwakha.Inezinto ezihlukahlukene, futhi izingxenye zayo eziyinhloko ziyinsimbi nekhabhoni.Insimbi iyinsimbi ecwengekile.Sivame ukuyibiza ngensimbi ye-iron alloy.Ukuze kuqinisekiswe amandla ayo kanye nepulasitiki, okuqukethwe kwekhabhoni ngokuvamile akudluli ku-1.7%.Ngaphezu kwensimbi nensimbi, izakhi eziyinhloko zensimbi ziyi-silicon, i-carbon manganese, isulfure, i-phosphorus nokunye.