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The gradation of non-coking coal is based on Gross Calorific Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per notification.


Grades of Coking Coal

Grade Ash Content
Steel Grade - I Not exceeding 15%
Steel Grade -II Exceeding 15% but not exceeding 18%
Washery Grade -I Exceeding 18% but not exceeding 21%
Washery Grade -II Exceeding 21% but not exceeding 24%
Washery Grade -III Exceeding 24% but not exceeding 28%
Washery Grade -IV Exceeding 28% but not exceeding 35%
Washery Grade – V Exceeding 35% but not exceeding 42%
Washery Grade -VI Exceeding 42% but not exceeding 49%

Grades of Semi-coking and Weakly Coking Coal

Grade Ash+Moisture
Semi Coking Grade -I Not exceeding 19%
Semi Coking Grade -II Exceeding 19% but not exceeding 24%

Grades of Non-coking Coal

GCV BAND (K.Cal./Kg.) GRADE
Exceeding 7000 G-1
Exceeding 6700 and not exceeding 7000 G-2
Exceeding 6400 and not exceeding 6700 G-3
Exceeding 6100 and not exceeding 6400 G-4
Exceeding 5800 and not exceeding 6100 G-5
Exceeding 5500 and not exceeding 5800 G-6
Exceeding 5200 and not exceeding 5500 G-7
Exceeding 4900 and not exceeding 5200 G-8
Exceeding 4600 and not exceeding 4900 G-9
Exceeding 4300 and not exceeding 4600 G-10
Exceeding 3700 and not exceeding 4000 G-12
Exceeding 3400 and not exceeding 3700 G-13
Exceeding 3100 and not exceeding 3400 G-14
Exceeding 2800 and not exceeding 3100 G-15
Exceeding 2500 and not exceeding 2800 G-16
Exceeding 2200 and not exceeding 2500 G-17