I-high-purity graphitized petroleum coke(GPC) yenziwe nge-coke yekhwalithi ephezulu ye-petroleum ngaphansi kwezinga lokushisa elingu-2,500-3,500°C. Njenge-carbon material ehlanzekile, inezici zokuqukethwe okuphezulu kwekhabhoni engaguquki, isibabule esiphansi, umlotha ophansi, i-porosity ephansi njll.Ingasetshenziswa njenge-carbon raiser (Recarburizer) ukukhiqiza insimbi yekhwalithi ephezulu, i-cast iron kanye ne-alloy.Ingasetshenziswa futhi kupulasitiki nenjoloba njenge-additive.Ingasetshenziswa njengomkhiqizi wekhabhoni (isithasiselo sekhabhoni.isithasiselo sekhabhoni. kanye nerabha njengesengezo.
