| Grade | MN | Silicon | Carpon | Sulphur | Phos | size |
|---|---|---|---|---|---|---|
| I | 65-70% Min | 15-18% | 2.2%Max | 0.05%max | 0.30%max | 10-60mm |
| II | 60-65% Min | 14-16% | 2.5%Max | 0.05%max | 0.30%max | 10-60mm |
| III | 55-60% Min | 13-14% | 2.5%Max | 0.04%max | 0.30%max | 10-60mm |
| Iv | 50-55% Min | 12-13% | 2.5%Max | 0.04%max | 0.30%max | 10-60mm |