... Japan, Korea, India, USA, Italy, Indonesia etc.Duratight Calcined Petroleum Coke has the features of high carbon,low sulphur,nitrogen and harmful impurities. So it has been ... steel-smelting, casting, brake pedal and friction material. No.Fix Carbon(min)Sulphur (Max)Ash(Max)V.M(Max)Moisture(Max)Grain size ...