Fireclay Chamotte Aggregates 70% Al2O3 from China
Fireclay-based chamotte aggregates with 70% alumina content serve as coarse fractions in refractory concrete for kilns and incinerators. Under HTS 2508.70.00.00 as chamotte or dinas earths, these are calcined clays not expanded or otherwise manufactured beyond aggregation. They enhance volume stability in high-heat environments.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Declare aggregate size distribution (e.g
• 3-6mm) in entry docs; ensure no binders added to avoid chemical preparation headings; use ISIRI or ASTM refractory standards for quality proof