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.
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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
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Bauxite Clay Refractory Ramming Mass
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Andalusite Clay Refractory Mortar
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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
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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.