Mullite Refractory Brick from Germany
Synthetic mullite bricks (3Al2O3·2SiO2) with over 60% alumina equivalent, used in blast furnace stove linings. Fired at high temperatures for superior creep resistance. HTS 6902.20.50.20 applies to these alumina-silica dominant refractory blocks.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.97, articles the product of a member state of the European Union, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 10 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide XRF analysis confirming alumina-silica percentages for customs verification
• Declare exact firing process to meet Chapter 69 (c) inorganic nonmetallic criteria