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3816.00.20.10/Mullite Clay Plastic Refractory/Japan

Mullite Clay Plastic Refractory from Japan

Synthetic mullite formed from clay, plasticized for ladle and tundish working linings. Under HTS 3816.00.20.10 as clay-derived refractory plastic composition.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• Document mullite synthesis from clay precursors via calcination records

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