Karfe da aka yi kumfa sun hada da aluminium, nickel da kuma kayan aikinsu. Bugu da ƙari, kumfa na jan karfe yana da wani wuri don haɓakawa.
Aluminum kumfa da allunan suna da haske a cikin nauyi kuma suna da halaye na ɗaukar sauti, rufin zafi, damping vibration, girgiza makamashi da sha na lantarki, da dai sauransu sun dace da tasirin kariya na makamai masu linzami, jirgin sama da sassan da aka dawo dasu, mota. buffers, electro-mechanical vibration damping na'urorin, bugun jini Power electromagnetic kalaman garkuwa, da dai sauransu.

Kumfa na nickel yana da haɓakar iska, babban yanki na musamman da ƙarfin capillary saboda tsarin pore da aka haɗa da babban porosity. Ana amfani dashi galibi azaman kayan aiki don yin masu tace ruwa, atomizers, catalysts, faranti na batir da mai musayar zafi da sauransu.

Copper foamed yana da kyawawa mai kyau da ductility, kuma farashin shirye-shiryensa ya yi ƙasa da na kumfa nickel, kuma ƙarfin wutar lantarki ya fi kyau. Ana iya amfani da shi don shirya kayan lantarki mara kyau na baturi (mai ɗaukar kaya), masu ɗaukar kaya da kayan kariya na lantarki. Musamman amfani da tagulla da aka yi kumfa a matsayin tushen kayan lantarki na baturi yana da wasu fa'idodi a bayyane, amma juriyar lalata tagulla ba ta da kyau kamar na nickel, wanda ke iyakance wasu aikace-aikacensa.