... FerroChrome alloy: (0Cr21Al4, 0Cr21Al6, 0Cr25Al5, 0Cr21Al6Nb, 0 Cr27Al7Mo2, 1Cr13Al4), etc. Nickel-Chrome alloy: (Cr20Ni80, Cr30Ni70,Cr20Ni30,Cr20Ni35, Cr15Ni60), etc.Electric Resistance ... power the distace is uniform after extruded bright surface,mainly used in small electric furmace,muffle furnace, heating air condition equipment ...