China High Alumina Al2O3 Heat Resistance Fire Resistant Brick Sk30/Sk32/Sk34 Refractory Brick for Furnace Lining, Find details about China Fire Resistant Brick, High Alumina from China High Alumina Al2O3 Heat Resistance Fire Resistant Brick Sk30/Sk32/Sk34 Refractory Brick for Furnace Lining
International code name | SK35 | SK36 | SK37 | SK38 | SK40 |
Al2O3/% | ≥48 | ≥55 | ≥65 | ≥75 | ≥80 |
Fe2O3/% | ≤2 | ≤2 | ≤2 | ≤2 | ≤2 |
Refractoriness | ≥1750 °C | ≥1770 °C | ≥1790 °C | ≥1790 °C | ≥1790 °C |
Apparent porosity | ≤22% | ≤22% | ≤23% | ≤23% | ≤21% |
Cold crushing strength | ≥39Mpa | ≥44Mpa | ≥49Mpa | ≥54Mpa | ≥65Mpa |
Refractoriness under load (0.2MPa) | ≥1420 °C | ≥1470°C | ≥1500 °C | ≥1520 °C | ≥1530 °C |
Reheating Linear Change (1500°C 2h) % | +0.1~ -0.4 *1450°C | +0.1~ -0.4 | +0.1~ -0.4 | | +0.1~ -0.4 |