Loading...
HSChapter 25
U.S. imports of fire clay (including calcined) (HS 250830) totaled $21K in April 2026, traded with 5 countries.
Last updated: April 2026 dataDefined by its high alumina content and ability to withstand temperatures exceeding 1,500°C without deforming, fire clay is a foundational raw material for refractory bricks, kiln furniture, and furnace linings used in steel, glass, and cement production. Canada leads US import supply, with China and Spain as secondary sources. The single tariff line (2508300000) covers both raw and calcined forms; calcined fire clay (grog) is a distinct commercial product used to control shrinkage in refractory mixes, and its processing state should be clearly stated on entry documentation.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Fire clay is characterized by its high alumina-to-silica ratio and its pyrometric cone equivalent (PCE) rating, which must typically exceed cone 19 (approximately 1,520°C) to qualify as a true refractory clay. Kaolin and ball clays may overlap in composition but are classified under their own headings (2507 and 2508.40 respectively). When the mineralogical character is ambiguous, a PCE test result or X-ray diffraction analysis can support the classification.
No — calcined fire clay (grog) remains classified under 2508300000 alongside raw fire clay. However, if the grog has been further processed into shaped refractory articles, it would move into Chapter 69. Importers should confirm the form and processing state with their supplier to ensure the correct heading is declared.
Supplier Network
Get discovered by U.S. importers searching for HS 250830 — Fire Clay (Including Calcined). Be the first supplier listed.
Monthly import values over time