STEAM COAL 63-61Parameters Basis Unit Guarantee Rejection 1. GCV ADB Kcal/kg 6,300 Below 6,1002. Total Moisture ARB % by weight 12% Max -3. Inherent Moisture ADB % by weight 14% Max Above 16%.4. Ash Content ADB % by weight 14% Max Above 16%.5. Sulfur Content ADB % by weight 1 %max Above 1.0%6. Volatile Matter ADB % by weight 43% Approx 7. Hard Grove Index (HGI) Index Point 45-55% 8. Fixed Carbon By Difference 9. Siz10. 0 â 50 mm 85% Min 10. AFT (Ash Fushion Temperatures) 1250 C 14%Volatile Matter (VM) Air Dried Basis 37,31% -Sulfur Air Dried Basis 1,8% >2,3%Fixed Carbon (FC) Air Dried Basis By Different -Gross Calorific Value Air Dried Basis 7.241Kcal/Kg