Andalusite Refractory Block from Canada
Refractory blocks containing andalusite (Al2SiO5) yielding >50% alumina-silica, for steel ladle impact zones. High-fired for thermal shock resistance in construction applications. Classed under 6902.20.50.20 as other alumina-silica refractory goods.
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
• Include petrographic analysis showing crystalline structure post-firing
• Segregate from earthenware shipments; refractories cannot absorb >3% water per US notes