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SITCSection 6
U.S. imports of non-siliceous refractory bricks, blocks & tiles (SITC 66232) totaled $19.0M in April 2026, traded with 32 countries.
Importers of Non-Siliceous Refractory Bricks, Blocks & Tiles paid $1.9M in duties in April 2026 — an effective duty rate of 12% on $15.3M in dutiable value, based on actual customs collections rather than the published tariff schedule. Non-Siliceous Refractory Bricks, Blocks & Tiles imports of $19.0M in April 2026 ran 11% below the year-to-date monthly average of $21.4M.
Last updated: April 2026 dataAlumina, magnesia, chrome, and other non-siliceous refractory ceramic shapes — bricks, blocks, and tiles — are critical consumables in steel furnaces, cement kilns, glass tanks, and petrochemical reactors, where they must withstand extreme thermal and chemical stress. Classification turns on the dominant refractory mineral (e.g., magnesia vs. alumina content), which determines both the tariff line and the applicable duty treatment. Importers should note that several non-siliceous refractory lines have been subject to antidumping or countervailing duty orders, making supplier origin and mill certification documentation essential at entry.
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The split is based on the dominant refractory material: siliceous fossil meal or siliceous earth compositions fall under a separate heading, while alumina, magnesia, chrome, dolomite, and other non-siliceous mineral-based shapes fall under this category. The precise HTS subheading depends on the percentage of specific oxides (e.g., alumina content thresholds), so a chemical composition certificate from the manufacturer is typically required for correct classification.
Yes. Certain non-siliceous refractory products, particularly magnesia-carbon and alumina-based bricks from specific origins, have historically been subject to antidumping or countervailing duty orders in the US. Importers should check the current scope of active orders with CBP and the International Trade Administration before sourcing, as scope rulings can be narrow and product-specific.
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Monthly import values over time