High-Alumina Fire Clay Refractory Mortar
A refractory mortar composed primarily of high-alumina fire clay mixed with binders, designed for high-temperature applications like furnace linings. It falls under HTS 3816.00.20.10 as a clay-based refractory composition other than those in heading 3801, providing thermal resistance and adhesion in kiln construction.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If silicon carbide or graphite content exceeds clay
Compositions with silicon carbide or graphite as principal components shift to subheading 3816.00.40.
If pre-formed into refractory bricks
Shaped refractory bricks of clay are classified under Chapter 69 as finished products, not compositions.
If raw fire clay without binders
Unmixed clays lack the mortar/concrete composition required for 3816, falling under raw clays in 2508.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify clay content exceeds 50% and test thermal resistance to confirm classification under 3816.00.20.10
• Include material safety data sheets (MSDS) and firing temperature specs in documentation to avoid reclassification
• Watch for mislabeling as plain clay (3801), which has different duties; ensure 'refractory composition' labeling
Related Products under HTS 3816.00.20.10
Fireclay Gunning Mix Refractory
A pneumatic-applied fireclay refractory mix for repairing furnace hot spots via guniting. Falls under HTS 3816.00.20.10 as clay-based refractory concrete for spray application in steel plants.
Bauxite Clay Refractory Ramming Mass
Ramming mass blending bauxite clay for electric arc furnace bottoms, offering abrasion resistance. Classified HTS 3816.00.20.10 for clay-dominant refractory mixes including dolomite ramming variants.
Andalusite Clay Refractory Mortar
Mortars using andalusite clay for thermal shock resistance in glass tank regenerator checkers. HTS 3816.00.20.10 covers this clay refractory mortar excluding 3801.
Silimanite Fire Clay Ramming Mix
High-silimanite fire clay ramming mix for coreless induction furnaces. HTS 3816.00.20.10 clay refractory explicitly includes such ramming mixes.
Dolomite Ramming Clay Mix
A dry clay-based ramming mix using calcined dolomite clay for lining induction furnaces, rammed into place before firing. Classified in HTS 3816.00.20.10 as a clay refractory composition explicitly including dolomite ramming mix, excluding heading 3801 products.
Kaolin-Based Plastic Refractory Clay
Plastic refractory clay made from kaolin with plasticizers for forming dense linings in boilers and incinerators. It qualifies under HTS 3816.00.20.10 as a clay refractory mortar/concrete composition for high-heat resistance.