Aluminum Hardeners 
Anode 
Cathode 
Coking coal 
Aluminium-Titanium 
Calcined Petroleum Coke
| Specification | Percent | |
| Fixed carbon | 98.0% | Min |
| S | 0.5% | Max |
| P | 0.2% | Max |
| Ash | 1.0% | Max |
| V.M | 1.0% | Max |
| Moisture | 0.5% | Max |
| size | 1-3 mm | Min 88% |
| Less than 1 mm | Max 6% | |
| Over than 3 mm up to 5 mm | Max 6% |
Calcined Petroleum Coke
| Specification | Percent | |
| Fixed carbon | 98.0% | Min |
| S | 0.5% | Max |
| P | 0.2% | Max |
| Ash | 1.0% | Max |
| V.M | 1.0% | Max |
| Moisture | 0.5% | Max |
| size | 1-3 mm | Min 88% |
| Less than 1 mm | Max 6% | |
| Over than 3 mm up to 5 mm | Max 6% |
