|
Physical Properties (after firing) |
ASTM Classification | Class E | Class F | Class G | |||
| Max. Service Temperature (°C) | 1600 | 1700 | 1800 | ||||
|
Chemical Analysis (XRF) |
AL2O3 (%) | 58 | 82 | 93 | |||
| SiO2 (%) | 33 | 6 | 0.3 | ||||
| Fe2O3 (%) | 1.0 | 1.8 | 0.1 | ||||
|
Bulk Density (ASTM C134) |
Dried at (110°C) |
Maximum (Kg/m³) | 2300 | 2700 | 2950 | ||
|
Fired to (815°C) |
2250 | 2650 | 2900 | ||||
|
(1600°C) |
2300 | ||||||
|
(1700°C) |
2700 | ||||||
|
(1800°C) |
2900 | ||||||
|
Cold Crushing Strength (ASTM C133) |
Dried at (110°C) |
Minimum (Kg/cm2) | 570 | 620 | 750 | ||
|
Fired to (815°C) |
350 | 450 | 400 | ||||
|
(1600°C) |
470 | ||||||
|
(1700°C) |
500 | ||||||
|
(1800°C) |
550 | ||||||
|
Permanent Linear Change (ASTM C113) |
Fired to (815°C) |
Maximum (%) | -0.20 | -0.20 | -0.20 | ||
|
(1600°C) |
+0.01 | ||||||
|
(1700°C) |
-1.50 | ||||||
|
(1800°C) |
-1.50 | ||||||
|
Thermal Conductivity (BS 1902) |
Mean Temp. (°C) |
400 | W/mK | 0.79 | 160 | 1.70 | |
| 600 | 0.86 | 1.46 | 1.60 | ||||
| 800 | 0.89 | 1.43 | 1.58 | ||||