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.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing >50% graphite or carbon
High carbon content refractories fall under specific 6903 provisions.
If imported as carbide powders rather than shaped goods
Unshaped carbides are chemical products under Chapter 28, not fired constructional goods.
If for industrial furnace lining sets
Assembled sets for furnaces may classify under 6906 if not individual bricks.
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Import Tips & Compliance
• Provide firing certificates showing temperatures >800°C to confirm Chapter 69 applicability
• Include SiC content certification; avoid declaring as 'articles of chapter 82' if shaped for construction
Related Products 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.