Alloy maras sumul karfe bututu ne mai irin sumul karfe bututu, kuma aikinsa ya fi na talakawa sumul karfe bututu.Alloy sumul karfe bututu ƙunshi abubuwa kamar silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminum, jan karfe, boron, rare duniya, da dai sauransu.