High-Alumina Refractory Firebrick from Germany
High-alumina refractory firebricks are ceramic bricks composed primarily of alumina, fired at high temperatures to withstand extreme heat above 1500°C. They are used in furnace linings and kilns for their excellent thermal shock resistance and corrosion resistance. Classified under HTS 6902.90.50 as refractory ceramic constructional goods other than siliceous fossil meals, due to their fired ceramic composition for high-temperature industrial applications.
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
• Verify firing temperature exceeds 800°C and provide manufacturer specs confirming refractory properties to avoid exclusion from Chapter 69
• Include test reports on thermal conductivity and chemical composition to support classification as 'other' refractory bricks