70% Alumina Refractory Brick
Standard 70% Al2O3 refractory brick fired for use in glass tank regenerator checkers and cement kilns. HTS 6902.20.10.20 covers 'other' bricks exceeding 50% alumina or silica, as constructional ceramic goods per Chapter 69 notes. High thermal shock resistance defines its refractory application.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made from fused magnesia or chrome-magnesia
Heading 6901 prioritizes basic refractories like magnesia over alumina-silica in 6902.
If for bulk or irregular blocks not qualifying as 'bricks'
Other constructional goods beyond standard bricks fall into 6903.90 residual provision.
If fitted as electrical insulators
Chapter note (f) excludes electrical insulators from Chapter 69, directing to Chapter 85.
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Import Tips & Compliance
• Use ASTM C373 water absorption tests if absorption rate questioned, though primarily composition-driven for refractories
• Include manufacturer specs on firing process (>800°C) to comply with Chapter 69 firing requirement
Related Products under HTS 6902.20.10.20
High-Alumina Refractory Firebrick
A refractory brick containing over 50% alumina (Al2O3), fired after shaping for high-temperature resistance in furnaces and kilns. Classified under HTS 6902.20.10.20 as 'other' bricks made from alumina-silica mixtures, designed for constructional use in industrial heating equipment. Meets Chapter 69 requirements for fired ceramic goods excluding those in headings 6901-6903.
Alumina-Silica Refractory Brick for Steel Ladles
Dense refractory brick with >50% combined Al2O3 and SiO2, engineered for lining steel ladles in metallurgy. Falls under HTS 6902.20.10.20 as 'other' bricks for high-heat industrial construction, fired to withstand molten metal exposure. Excludes basic siliceous fossil meal products per hierarchy.
Silica-Alumina Backup Refractory Brick
Backup layer refractory brick with balanced >50% SiO2-Al2O3 for furnace hot repair and lining support. Classified in HTS 6902.20.10.20 as 'other' non-fossil meal bricks, fired ceramic constructional goods for industrial refractories. Provides insulation behind wear-resistant hot face bricks.
High-Duty Alumina Refractory Brick for Incinerators
High-duty brick with >60% Al2O3 for waste incinerator walls, fired to Chapter 69 standards. HTS 6902.20.10.20 'other' bricks exclude siliceous earths, focusing on alumina-silica for extreme heat construction. Resists chemical erosion from combustion byproducts.
Phosphate-Bonded Alumina Refractory Brick
Phosphate-bonded brick exceeding 50% Al2O3, fired for abrasion resistance in rotary kilns. HTS 6902.20.10.20 as 'other' constructional refractory bricks per Chapter notes on inorganic nonmetallic firing. Bonds enhance strength without compromising refractoriness.