Technical data
| Properties | Unit | Classification | |
|---|---|---|---|
| AT55 | AT60 | ||
| Bulk density, min. | g/cm³ | 2.35 | 2.4 |
| Apparent porosity, max. | % | 18 | 18 |
| Cold crushing strength, min. | MPa | 45 | 45 |
| Refractoriness under load t0,6, min. | ℃ | 1600 | 1620 |
| Refractoriness, min. | sP | 177 | 177 |
| Chemical consist, Al₂O₃, min. | % | 55 | 60 |
| Chemical consist, Fe ₂O₃ , max. | % | 1.5 | 1.4 |