... min,S 0.05%max,HS code:3801100090 carburizer for steel making,nodular cast iron Specifications as bellow:Graphitized Petroleum Coke/Artificial Graphite ... usOur company has been manufacturing and exporting graphite products for about 20 years,enjoying a good fame among the ... world.Our main items are used as carbon additives for steelmaking,foundry,casting and alloy,including Calcined Petroleum Coke( ...