| Item | Unit | Index |
| Cr2O3 | % | ≥46.0% |
| SiO2 | % | ≤1.0% |
| FeO | % | ≤26.5% |
| CaO | % | ≤0.30% |
| MgO | % | ≤10.0% |
| Al2O3 | % | ≤15.5% |
| P | % | ≤0.003% |
| S | % | ≤0.003% |
| Cr/Fe | 1.55:1 | |
| Bulk Density | g/cm³ | 2.5-3 |
| Color | / | Black |
| PH | / | 7-9 |
| The amount of the acid | / | ≤ 2 ML |
| Percent soil | % | ≤0.1 |
| Percent Moisture | % | ≤0.1 |
| The sintered | ℃ | 1600 |
| Percentage of free acid present in the sand | % | 0 |
| filling density | g/cm³ | 2.6 |
| sintering point | °C | > 1,800 |
| melting temperature | °C | 2,180 |
