Insulating Alumina Refractory Brick from Canada
Lightweight insulating brick with >50% alumina and porous structure for furnace backup insulation. Fired ceramic retains low thermal conductivity at high temps. 6902.20.10 for high-alumina refractory bricks.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide bulk density specs (<1.0 g/cm³ typical for insulating grade)
• Distinguish from dense bricks via thermal performance data
• Confirm no organic binders; must be fully fired inorganic per chapter note