70% Alumina Kiln Brick
Kiln brick composed of 70% alumina for pottery and glass kilns, providing superior refractoriness. Shaped and fired to maintain structural integrity at 1700°C+. HTS 6902.20.10 applies to alumina-dominant refractory bricks.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If <50% Al2O3/SiO2 but still refractory
Other refractory compositions fall under 6902.90 residual provision.
If used as refractory tiles <3.2cm thick
US note excludes thick tiles from 'tiles'; thin ones may go to 6907.
If functioning as electrical insulator
Chapter exclusion for electrical insulators sends to Chapter 85.
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Import Tips & Compliance
• Provide manufacturer specs confirming firing temperature and alumina percentage
• Label as 'refractory' to avoid confusion with ceramic tiles (<3.2cm thick excluded elsewhere)
• Bundle import docs with thermal conductivity data for customs validation
Related Products under HTS 6902.20.10
High-Alumina Refractory Firebrick
High-alumina refractory firebrick containing over 50% alumina (Al2O3), fired after shaping for high-temperature resistance. Used in furnaces and kilns for lining to withstand extreme heat without deforming. Classifies under 6902.20.10 as refractory bricks with predominant alumina content.
Silica-Alumina Refractory Brick
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.
Blast Furnace Alumina Brick
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Insulating Alumina Refractory Brick
Lightweight insulating brick with >50% alumina and porous structure for furnace backup insulation. Fired ceramic retains low thermal conductivity at high temps. 6902.20.10 for high-alumina refractory bricks.
Chrome-Alumina Refractory Brick
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Steel Ladle Alumina Brick
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