High Silica Refractory Brick 76 mm – AT21

Release time: 2026-02-28 22:26:14 Page viewed: 824

High Silica Refractory Brick (AT-21)
Dimensions:
Type 76
Height (mm): 76
Length (mm): 230
Width (mm): 114
Chemical Composition:
SiO₂ (Silicon Oxide) (%): 75.0 min
Al₂O₃ (Aluminum Oxide) (%): 18.0 min
TiO₂ (Titanium Oxide) (%): 1.3 max
Fe₂O₃ (Ferric Oxide) (%): 1.8 max
CaO + MgO + Na₂O + K₂O (Alkalis) (%): 3.0 max
Physical Properties:
Bulk Density (g/cm³): 1.9
Apparent Porosity (%): 22.0 max
Cold Crushing Strength (N/mm²): 20.0 min
Creep Under Load at 1300 °C (N/mm²): 2.0 min
Refractoriness (%): 28.0 min
Reversible Expansion at 1000 °C (%): 0.7 min
Thermal Conductivity at (W/m·K):
400 °C: 0.99
600 °C: 1.07
800 °C: 1.15
1000 °C: 1.23