Silica-Alumina Refractory Brick from Mexico
Refractory brick with >50% combined silica (SiO2) and alumina, engineered for blast furnace linings. Fired ceramic construction withstands thermal shock and corrosion from molten materials. Falls under 6902.20.10 for high-silica/alumina refractory bricks.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Submit lab test results per ASTM C357 for oxide content to prove >50% Al2O3/SiO2
• Include end-use declaration as refractory to distinguish from common bricks
• Check for proper HS declaration; mixtures must total >50% specified oxides