High Alumina Fire Brick — 50%
50% alumina, 2.3 g/cc, 22% apparent porosity, 400–450 kg/cm² cold crushing strength and RUL of 1420–1430 °C. The middle of the series and the usual default where the duty is thermal rather than chemical.
| Al₂O₃ content, % | 50 |
|---|---|
| Fe₂O₃ content, % | 3 |
| Bulk density, g/cc | 2.3 |
| Apparent porosity, % | 22 |
| Cold crushing strength, kg/cm² | 400-450 |
| Refractoriness, Orton/°C | — |
| RUL (Ta), °C | 1420-1430 |
Values as published by the manufacturer. Manufacturer TDS governs.
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