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

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.

3818.00.00Higher: 50% vs 38%

If fused cast refractories

Artificial graphite or fused products exclude clay-based 3816.

2508.60.00.00Lower: 35% vs 38%

If calcined clay only

Calcined clays lack plasticizer/binder for 3816 mortar status.

Not sure which classification is right?

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Import Tips & Compliance

Document mullite synthesis from clay precursors via calcination records

Specify plasticity index >15% to confirm 'plastic refractory' status

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