High Alumina Fire Brick — 60%
61% alumina at 2.56 g/cc, with porosity down to 20.3% and 510 kg/cm² cold crushing strength. From this grade upward the brick is dense and stiff, which raises strength but also raises the elastic modulus — worth weighing where the furnace cycles hard.
| Al₂O₃ content, % | 61.05 |
|---|---|
| Fe₂O₃ content, % | 2.95 |
| Bulk density, g/cc | 2.56 |
| Apparent porosity, % | 20.31 |
| Cold crushing strength, kg/cm² | 510 |
| Refractoriness, Orton/°C | — |
| RUL (Ta), °C | — |
Values as published by the manufacturer. Manufacturer TDS governs.
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