Alloy enweghị nkebi nchara anwụrụ bụ ụdị enweghị enweghị nkebi ígwè ọkpọkọ, na arụmọrụ ya dị elu karịa nke nkịtị enweghị nkebi ígwè ọkpọkọ.Alloy enweghị nkebi ígwè ọkpọkọ nwere ihe ndị dị ka silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, ọla kọpa, boron, obere ụwa, wdg.