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Main properties Clay Castables:
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| Brand | PN-NN42 | PN-NN45 |
| Al2O3 (%); | 41 | 46 |
| Bulk density (g/cm3) | 110℃×16h | 2.23? | 2.26 |
| Cold Crushing Strength (MPa) | 110℃×16h | 36 | 40 |
| 1000℃×3h | 42 | 45 |
| 1200℃×3h | 46 | 48 |
| Modulus Of Rupture (MPa) | 110℃×16h | 7 | 8 |
| 1000℃×3h | 8 | 8 |
| 1200℃×3h | 8 | 9 |
| Linear Change (%) | 110℃×16h | 0~-0.2 | 0~-0.2 |
| 1000℃×3h | 0~-0.35 | 0~-0.35 |
| 1200℃×3h | 0~-0.55 | 0~-0.55 |
