Andalusite Refractory Bricks from Canada
Andalusite refractory bricks incorporate mullite-forming andalusite for excellent thermal shock resistance in coke ovens and reheat furnaces. Fired ceramic structure ensures dimensional stability. HTS 6902.90.10 captures these non-siliceous specialty 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 mineralogical analysis confirming andalusite/mullite transformation
• Test for reversible thermal expansion per ASTM C837 standards
• Label with maximum service temperature (typically 1550°C)