Silica-Alumina Refractory Brick from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 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