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2508.30.00.00/Raw Fire-Clay Lumps/China

Raw Fire-Clay Lumps from China

Raw fire-clay in lump form is unprocessed high-alumina clay mined for refractory applications like stove linings. Classified under HTS 2508.30.00.00 as fire-clay, distinct from expanded clays or other minerals. It provides the base material for firebricks and pottery kilns.

Duty Rate — China → United States

12.5%

Rate breakdown

9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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Import Tips

• Provide mining certificates proving natural fire-clay origin to prevent misclassification as processed earths

• Ensure no prior calcination or shaping, as worked forms may classify under Chapter 68

• Test for moisture content; excessive drying could imply processing shifting to chamotte (still 2508 but note differences)