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| Item | Fire-resistant and Acid-resistant Brick | |||
| Al-28 | Al-30 | Al-35 | Al-40 | |
| Al2O3(%) | ≥28 | ≥30 | ≥35 | ≥40 |
| Bulk Density (g/cm3) | 2.0-2.1 | 2.05-2.15 | 2.10-2.15 | 2.15-2.25 |
| Cold Crushing Strength (MPa) | ≥30 | ≥30 | ≥35 | ≥35 |
| Refractoriness Under Load (0.2MPa) ℃ | 1300 | 1350 | 1370 | 1420 |
| Refractoriness (℃) | ≥1700 | ≥1700 | ≥1770 | ≥1790 |
| Acid Resistance (%) | ≥98 | ≥98 | ≥98 | ≥98 |
| Apparent Porosity (%) | ≤20 | ≤20 | ≤21 | ≤21 |
