Carbon-graphite bụ ihe na-eme mmanụ n'onwe ya, ọ bụkwa ihe mkpuchi ihu dị iche iche ejiri ya na mgbanaka mating nke ihe ndị siri ike dị ka silicon carbide, alumina, ma ọ bụ tungsten carbide. Carbon anyị nwere njiri mara mma yana nguzogide kemịkalụ sara mbara. Corrodents siri ike gụnyere hydrofluoric na acid nitric, carbongrades pụrụ iche dị.