Ipayipi lensimbi engenamthungo liwuhlobo lwepayipi lensimbi elingenamthungo, futhi ukusebenza kwalo kuphakeme kakhulu kunokwepayipi elivamile lensimbi elingenamthungo.Ipayipi lensimbi engenamthungo liqukethe izakhi ezifana ne-silicon, i-manganese, i-chromium, i-nickel, i-molybdenum, i-tungsten, i-vanadium, i-titanium, i-niobium, i-zirconium, i-cobalt, i-aluminium, ithusi, i-boron, umhlaba ongavamile, njll.