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HSChapter 28
U.S. imports of artificial corundum (HS 281810) totaled $19.6M in July 2026, traded with 24 countries.
Importers of Artificial Corundum paid $1.1M in duties in July 2026 — an effective duty rate of 6.6% on $17.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Artificial Corundum imports of $19.6M in July 2026 ran 62% above the year-to-date monthly average of $12.1M.
Last updated: July 2026 dataArtificial corundum — fused aluminum oxide produced in electric arc furnaces — is the workhorse abrasive grain for grinding wheels, coated abrasives, and refractory linings, with purity and crystal structure determining its grade and price tier. The US tariff schedule distinguishes crude artificial corundum (2818101000) from further-processed forms, and within the latter separates high-purity white, pink, and ruby grades exceeding 97.5% Al₂O₃ (2818102010) from all other processed corundum (2818102090). China is by far the dominant global producer and the leading US import source under this heading, creating notable supply-concentration risk for abrasives manufacturers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
414 shipments/mo
The threshold is aluminum oxide purity: 2818102010 applies to white, pink, and ruby artificial corundum containing more than 97.5% Al₂O₃. Standard brown fused alumina — produced from bauxite and typically containing 94–97% Al₂O₃ with iron and titanium impurities — falls under 2818102090. The color and purity specification must be documented by the manufacturer's certificate of analysis to support the correct line.
Yes — artificial corundum from China has been subject to antidumping duty orders, and importers should confirm the current scope and cash deposit rates with CBP before importing. Additionally, Section 301 tariffs may apply to Chinese-origin corundum. Given China's dominant share of global supply, these measures materially affect sourcing decisions, and some buyers have shifted to Austrian or Canadian suppliers to manage duty exposure.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2818101000 | Crude Artificial Corundum | $13.3M | 7.32% | 97.88% | $974K |
| 2818102010 | White,Pink,Ruby Artif. Corundum, Gt 97.5% Al Oxide | $4.7M | 2.89% | 66.09% | $137K |
| 2818102090 | Artificial Corundum, NESOI | $1.6M | 2.34% | 85.71% | $37K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2818100000 | Artificial Corundum | $3.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$19.6MYoY · Pro
Exports
$3.0MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
China and Canada together supply 80% of it.
customs district
destination
entry
rate provision · imports
10.8% enters free of duty; the effective duty rate is 5.85%.