Russia Steam Coal Gross Calorific Value(ADB) no less than 6000 KCal/kg ( the higher, the better) Net Calorific Value(ARB) no less than 5000 KCal/kg ( the higher, the better) Total Sulfur (ADB) no more than 1% (the lower, the better) Volatile Matter(ADB) 10%~40% HGI: no less than 45