graphitized petroleum coke carburizer for steel making,foundry industry,nodular cast iron HS code3801100090,ISO9001 certifying Specifications ... 0.5-5mm,1-5mm,3-8mm,ect.PackageAbout usOur company has been manufacturing and exporting graphite products for about ... Our main items are used as carbon additives for steelmaking,foundry,casting and alloy,including Calcined Petroleum Coke(CPC),Amorphous ...