| grade | KG-NMJ60 | KG-NMJ65 | KG-NMJ70 | KG-NMJ75 | |
| Al2O3≥ | 60 | 65 | 70 | 75 | |
|
g/cm3≥ Bulk density |
110℃×24h | 2.4 | 2.5 | 2.6 | 2.7 |
|
MPa≥ Flexural strength |
110℃×24h | 7 | 8 | 9 | 10 |
| 1000℃×3h | 9 | 10 | 11 | 13 | |
|
MPa≥ Compressive strength |
110℃×24h | 55 | 60 | 65 | 80 |
| 1000℃×3h | 80 | 90 | 100 | 100 | |
|
% Heating line change rate |
1000℃×3h | ±0.3 | ±0.3 | ±0.3 | ±0.3 |
|
cm3≤ Cold crushing strength |
1000℃×3h | 9 | 8 | 7 | 7 |
|
Thermal shock resistance 1000℃ water cooled ≥ |
20 | 20 | 2 | 20 | |
|
℃ Max Using temperature |
1400 | 1450 | 1500 | 1550 | |
