... petroleum coke for steel, foundry and casting Stable quality Carburizer for special steel, ductile iron High carbon, low sulphur Stable quality; Used as carburizer for special steel and ductile ... and morphologies to meet the application, These materials have a dark, flat sheen. They are high in carbon but have reduced ... 5-5mm, 1-5mm, 3-8mm, ect. Graphitized Petroleum Coke for Steel, Foudry and Casting