Typical Export Coal Specification Description Value Calorific Value KCal/Kg 5500 KCal/Kg (ARB) Ng> Calorific Value Min (Kcal/Kg NCV) 5300 Kcal/Kg (ARB) Volatile Matter (ARB) 20% min Ash Content (ARB) 23% max Total Moisture (ARB) 14% max Total Sulphur (ARB) 1% max HandgroveGrindability Index ± 45 â?? 70 Top Sizing 50mm Ash Fusion Temperature (ID) 1150°C (in reducing atmosphere)