Other
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than those of siliceous fossil meals or similar siliceous earths: > Other: > Other
Duty Rate (from China)
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
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Subheadings
Products classified under HTS 6902.90.50
Mullite Refractory Brick
Mullite refractory bricks, synthesized from kaolin and fired, used in aluminum smelters for creep resistance at 1600°C+. Excellent for reducing atmospheres. Classed HTS 6902.90.50 other refractories.
Andalusite Refractory Tile
Andalusite refractory tiles fired from andalusite ore for torpedo ladle linings in steel plants, offering thermal shock resistance. HTS 6902.90.50 applies.
Bauxite Refractory Brick
Bauxite-based refractory bricks fired for lime kilns and incinerators. Good load-bearing at high temps. HTS 6902.90.50.
Chamotte Refractory Block
Chamotte (fired clay grog) refractory blocks for general furnace construction. Stable volume, low deformation. HTS 6902.90.50.
Cordierite Refractory Brick
Cordierite bricks for tunnel kilns in ceramics industry, excellent thermal shock resistance. Fired magnesia-alumina-silicate. HTS 6902.90.50.
High-Alumina Refractory Firebrick
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.
Magnesia-Chrome Refractory Brick
Magnesia-chrome refractory bricks combine magnesia and chrome ore, fired to create dense blocks for lining steelmaking furnaces and rotary kilns. They offer superior resistance to basic slags and high temperatures. Falls under HTS 6902.90.50 as 'other' refractory ceramic constructional goods, excluding siliceous earths.
Silicon Carbide Refractory Block
Silicon carbide refractory blocks are fired ceramic blocks made from silicon carbide grains, used in high-wear areas of incinerators and boiler linings. They provide exceptional abrasion resistance and thermal conductivity. Classified in HTS 6902.90.50 for other refractory ceramic constructional goods.
Zirconia Refractory Tile
Zirconia refractory tiles are precision-fired ceramic tiles with high zirconia content for lining glass melting tanks and petrochemical reactors. They resist molten glass corrosion and thermal cycling. HTS 6902.90.50 covers these as other refractory tiles, not siliceous earths.
Fireclay Refractory Block
Fireclay refractory blocks are made from high-temperature fired clay, used in blast furnace hearths and cement kilns for their plasticity and strength. They absorb shocks and resist abrasion. Fits HTS 6902.90.50 as other non-siliceous refractory constructional goods.
Insulating Refractory Brick
Lightweight insulating refractory bricks, fired from vermiculite-clay mixes, reduce heat loss in furnace walls and backup linings. Low thermal conductivity with high porosity. HTS 6902.90.50 for other refractory bricks.