Silica-Alumina Anchor Brick
Specialty anchor bricks with >50% SiO2 and Al2O3 mixture, fired for securing fiber modules in industrial furnaces. Designed for high-temperature suspension systems. Classified in 6902.20.50 as other refractory constructional bricks.
Import Duty Rates by Country of Origin
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 using diatomaceous earth base
Diatomite/siliceous fossil products prioritize 6902.10 classification.
If made primarily of iron/steel with ceramic coating
Metal-based anchors with refractory coatings classify under Chapter 73.
If thinner than 3.2 cm used as ceramic tiles
Thin refractory tiles shift to 6907 per US thickness note.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide engineering drawings showing anchor design for refractory intent
• Test for <3% water absorption per ASTM C373 to confirm fired status
• Separate from fiber modules to avoid set classification issues
Related Products under HTS 6902.20.50
High-Alumina Refractory Firebrick
High-alumina refractory firebricks containing over 50% Al2O3, fired after shaping for use in high-temperature furnaces and kilns. These bricks provide excellent thermal shock resistance and corrosion resistance in industrial applications like steelmaking. Classified under 6902.20.50 as refractory ceramic constructional goods other than siliceous fossil meals.
Alumina-Silica Refractory Block
Dense refractory blocks with a mixture of >50% Al2O3 and SiO2, fired for lining blast furnaces and incinerators. They withstand extreme temperatures and chemical erosion in metallurgical processes. Falls under 6902.20.50 as 'other' refractory bricks/blocks beyond basic siliceous types.
Magnesia-Alumina Refractory Brick
Refractory bricks blending >50% Al2O3 with magnesia for basic oxygen furnace linings, fired to high temperatures. Offers superior slag resistance in steel production. HTS 6902.20.50 applies to these 'other' high-alumina/silica content refractory bricks.
High-Purity Alumina Refractory Tile
Fired ceramic tiles with >70% Al2O3 content for lining rotary kilns in cement production. Provides abrasion resistance at temperatures over 1600°C. HTS 6902.20.50 covers these as 'other' refractory tiles.
Checker Refractory Brick
Honeycomb-structured bricks with >50% alumina-silica composition, fired for heat recuperators in glass furnaces. Enables efficient heat recovery through alternating passageways. 6902.20.50 classification for these specialized refractory bricks.
Slide Gate Refractory Block
Precision-fired blocks with high alumina content (>60% Al2O3) for molten steel slide gate valves in continuous casting. Resists thermal shock and erosion from liquid metal. Covered by 6902.20.50 as other refractory constructional blocks.