Mullite Clay Plastic Refractory
Synthetic mullite formed from clay, plasticized for ladle and tundish working linings. Under HTS 3816.00.20.10 as clay-derived refractory plastic composition.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If fused cast refractories
Artificial graphite or fused products exclude clay-based 3816.
If calcined clay only
Calcined clays lack plasticizer/binder for 3816 mortar status.
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
• Document mullite synthesis from clay precursors via calcination records
• Specify plasticity index >15% to confirm 'plastic refractory' status
Related Products under HTS 3816.00.20.10
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.
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.