U.S. imports of Artificial Corundum (SITC 52267) totaled $8.1M in August 2026, imported from 25 countries.
Importers of Artificial Corundum paid $396K in duties in August 2026, an average duty rate of 4.90% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Artificial Corundum imports of $8.1M in August 2026 ran 30% below the year-to-date monthly average of $11.6M.
Last updated: August 2026 dataFused aluminum oxide produced by electric-arc smelting — commercially known as artificial corundum or synthetic corundum — is the dominant abrasive grain used in grinding wheels, coated abrasives, and refractory linings. The heading covers both chemically defined and undefined forms, with color and purity (white, brown, pink, and ruby grades) determining hardness and friability for specific abrasive applications. Trade in artificial corundum has drawn Section 301 scrutiny given the concentration of fused-alumina production capacity in China, making origin documentation and country-of-origin marking a compliance priority for importers.
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351 import shipments a month
Brown fused alumina contains a small percentage of titanium oxide, giving it toughness suited for heavy stock removal on steel. White fused alumina is purer and more friable, preferred for precision grinding of hardened steels and ceramics. Pink and ruby grades incorporate chromium oxide for intermediate hardness and are used in tool-room grinding. Each grade may be priced and sourced differently, so specifying the grade on import documents aids accurate classification.
Yes. Artificial corundum originating in China has been subject to Section 301 tariffs, and importers should verify the current tariff list status and applicable exclusions before filing entry. Accurate country-of-origin documentation is essential, particularly when the material passes through a third country before reaching the US.
Basic heading 272 of 465 in section 5
Basic heading 52267 · $8.1M of $27.5B
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Imports · August 2026
origin
China and Austria together supply 66% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$8.1MYoY · free account
Exports
$2.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $142.0M of Artificial Corundum and exported $29.7M.
Through August 2026. Source: U.S. Census Bureau.