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HSChapter 28
U.S. imports of aluminum oxide (alumina), except artificial corundum (HS 281820) totaled $30.8M in April 2026, traded with 29 countries.
Importers of Aluminum Oxide (Alumina), Except Artificial Corundum paid $42K in duties in April 2026 — an effective duty rate of 11% on $388K in dutiable value, based on actual customs collections rather than the published tariff schedule. Aluminum Oxide (Alumina), Except Artificial Corundum imports of $30.8M in April 2026 ran 48% below the year-to-date monthly average of $59.7M.
Last updated: April 2026 dataCommercially known as alumina, this grade of aluminum oxide is the principal intermediate in the Bayer process refining chain and a critical feedstock for primary aluminum smelting. Brazil leads US imports under tariff line 2818200000, followed by China and Germany, reflecting the global concentration of bauxite refining capacity. Importers sourcing from China should be aware that aluminum-related products have faced Section 301 trade-remedy scrutiny, making origin documentation and classification precision especially important. Beyond smelting, calcined and hydrated alumina variants serve ceramics, abrasives, and catalyst support applications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Artificial corundum — fused alumina produced specifically for abrasive use — falls under a separate HTS heading (2818.10). Heading 2818.20 captures all other aluminum oxide, including calcined and tabular alumina used in refractories, ceramics, and as smelting feedstock. The key classification distinction is the intended production method and end-use grade, not simply the chemical formula.
Yes. Aluminum oxide sourced from China may be subject to Section 301 tariffs. Importers should verify the current status of applicable trade-remedy orders with a licensed customs broker before entry, as rates and product scope can change.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2818200000 | ALUMINUM OXIDE, EXCEPT ARTIFICIAL CORUNDUM, NESOI | $30.8M | 10.92% | $42K |
ALUMINUM OXIDE, EXCEPT ARTIFICIAL CORUNDUM, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2818200000 | ALUMINUM OXIDE, EXCEPT ARTIFICIAL CORUNDUM, NESOI | $22.0M |
ALUMINUM OXIDE, EXCEPT ARTIFICIAL CORUNDUM, NESOI
6.3M kg
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
ANHYDROUS AMMONIA
HS 281410
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
SILICON, UNDER 99.99% (BY WEIGHT) SILICON
HS 280469
PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS
HS 280920
| Port | Imports | Exports | Balance |
|---|---|---|---|
| BALTIMORE, MD | $9.2M | -- | -$9.2M |
| GRAMERCY, LA | $7.8M | -- | -$7.8M |
| LOS ANGELES, CA | $1.9M | $4.4M | +$2.5M |