Dense Fireclay Backup Refractory Brick
High-density fireclay brick used as backup lining behind wear-resistant courses in steel ladles and reheat furnaces. Provides thermal stability up to 1550°C. HTS 6902.90.10.10 applies to this clay refractory brick type.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If aluminous with >45% Al2O3
Alumina threshold determines shift from clay to high-alumina refractory category.
If containing carbon or graphite additions
Carbonaceous refractory articles classified under Chapter 68 additions.
If <3.2cm thick qualifying as refractory tile
US note thickness exclusion separates thin tiles from bricks.
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
• Specify bulk density >2.0 g/cm³ in technical data sheets for dense variant identification
• Use ISPM-15 compliant wooden pallets for heavy brick shipments to avoid quarantine issues
Related Products under HTS 6902.90.10.10
High-Alumina Fireclay Refractory Brick
A dense refractory brick made primarily from fireclay, fired at high temperatures to withstand extreme heat up to 1700°C. Used in furnace linings and kilns for its excellent thermal shock resistance and abrasion resistance. Classified under HTS 6902.90.10.10 as a clay-based refractory brick, distinct from siliceous or high-silica variants.
Standard Fireclay Refractory Brick
Standard-sized refractory brick composed of fireclay, designed for boiler and incinerator linings with service temperatures up to 1500°C. Offers good mechanical strength and chemical resistance to slags. Falls under HTS 6902.90.10.10 specifically for clay-composed refractory bricks other than siliceous types.
Shaped Fireclay Refractory Brick for Glass Furnaces
Custom-shaped fireclay bricks designed specifically for glass tank furnace crowns and walls, resisting molten glass corrosion at 1500°C+. Made from selected clay blends and high-fired. Classed under 6902.90.10.10 as clay refractory bricks.
Fireclay Checker Brick for Regenerators
Perforated fireclay bricks arranged in checkerwork patterns for heat recovery regenerators in glass and steelmaking furnaces. Optimized channels for gas flow at 1300-1400°C service. Specifically clay refractory bricks under HTS 6902.90.10.10.
Super-Duty Fireclay Refractory Brick
Premium super-duty fireclay brick with superior creep resistance for crown construction in reheating furnaces serving at 1500°C+. Low iron formulation enhances slag resistance. HTS 6902.90.10.10 clay brick classification.
Plastic Fireclay Refractory Brick
Fireclay brick produced via plastic forming method for complex shapes in boiler settings and ladle backup. Excellent workability and fired strength up to 1480°C. Clay-based refractory brick under 6902.90.10.10.