6902.90.50.20/High-Alumina Refractory Firebrick/Japan

High-Alumina Refractory Firebrick from Japan

High-alumina refractory firebricks are dense ceramic bricks composed primarily of alumina and silica, 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 6902.90.50.20 as refractory ceramic constructional goods other than siliceous fossil meals, due to their fired ceramic composition for high-temperature industrial applications.

Duty Rate — Japan → 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
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Import Tips

• Verify chemical composition and firing temperature documentation to confirm classification as refractory goods fired above 800°C

• Provide test certificates showing refractoriness under load (RUL) to avoid misclassification as building bricks

• Check for proper marking of dimensions and ensure no impregnation with resins, as that excludes from Chapter 69