Tuubbooyinka birta ee Alloy-ka ah waa nooc ka mid ah tuubooyinka birta ah ee bilaa-xaraxa ah, waxqabadkeeduna aad ayuu uga sarreeyaa midka caadiga ah ee birta birta ah.Alloy birta birta aan seamling ka kooban yahay walxo ay ka mid yihiin silicon, manganese, chromium, nikkel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminium, copper, boron, dhul dhif ah, iwm.