Insimbi engagqwali iqoqo lama-alloy ayoniwe aqukethe okungenani okungenani u-11% we-chromium, ukwakheka okuvimbela i-ayoni ukuthi ingagqwali futhi inikeze nezakhiwo ezikwazi ukumelana nokushisa.Izinhlobo ezahlukene zensimbi engagqwali zihlanganisa i-elementi carbon (kusuka ku-0.03% kuya ku-1.00%), i-nitrogen, i-aluminium, i-silicon, isulfure, i-titanium, i-nickel, ithusi, i-selenium, i-niobium, ne-molybdenum.Izinhlobo ezithile zensimbi engagqwali zivame ukuqokwa ngenombolo yazo enezinombolo ezintathu ze-AISI, isb, 304 engagqwali.