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

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3%+35.0%38%
🇲🇽Mexico3%+10.0%13%
🇨🇦Canada3%+10.0%13%
🇩🇪Germany3%+10.0%13%
🇯🇵Japan3%+10.0%13%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

3816.00.20Same rate: 38%

If silicon carbide or graphite content exceeds clay

Compositions with silicon carbide or graphite as principal components shift to subheading 3816.00.40.

6902.20.10Lower: 35% vs 38%

If pre-formed into refractory bricks

Shaped refractory bricks of clay are classified under Chapter 69 as finished products, not compositions.

2508.30.00.00Lower: 10% vs 38%

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