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Official data Source: US Census Bureau international trade data Data through August 2026 · updated monthly

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HS 2818.10

Artificial corundum, whether or not chemically defined

In short

  • The US imported $142.0M of this product over the 12 months to August 2026, down 8.8% on the year before.
  • China is the largest supplier, with 40.3% of US imports; Austria is next, with 26.1%.
  • Duty paid averaged 4.9% of the value of imports in August 2026, down 4.6 points on a year earlier.
  • Austria is gaining share: 17.3% over the last 12 months, up from 14.4%.
  • 3 Federal Register notices named this product's tariff codes in the last 12 months.
  • US exports were $29.7M over the last 12 months; the largest market is Canada, with 26.7%.

US imports, Aug 2026

$8.1M

↓ −32% vs Aug 2025

Last 12 months

$142.0M

↓ −8.8% vs the 12 months before

Average duty paid

4.9%

↓ −4.6 pts vs Aug 2025

Top supplier

China

40.3% of US imports

US imports by month

The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

Aug2025SepOctNovDecJan2026FebMarAprMayJunJulAugDuty ↓
Show the numbers
MonthUS imports
August 2025$12.0M
September 2025$16.2M
October 2025$11.6M
November 2025$13.6M
December 2025$7.8M
January 2026$14.5M
February 2026$6.2M
March 2026$12.2M
April 2026$7.4M
May 2026$11.5M
June 2026$13.3M
July 2026$19.6M
August 2026$8.1M

What changed

  • US imports were $8.1M in August 2026, down 59% from July 2026 and down 32% from August 2025.
  • Over the 12 months to August 2026 they totalled $142.0M, down 8.8% on the 12 months before.
  • Biggest moves in market share since July 2026: Austria up from 6.0% to 26.1%, China down from 73.4% to 40.3%.
  • Duty paid on imports from Austria rose from 1.3% to 4.4% of their value since July 2026.
  • Duty paid on imports from Germany rose from 2.8% to 5.3% of their value since July 2026.

US trade by year

US imports were $142.0M in the 12 months to Aug 2026, up 12% on the 12 months to Aug 2017. US exports were $29.7M, down 48%. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

2017201820192020202120222023202420252026Duty ↑Duty ↑
Show the numbers
PeriodUS imports
12 months to Aug 2017$126.4M
12 months to Aug 2018$154.6M
12 months to Aug 2019$185.6M
12 months to Aug 2020$133.4M
12 months to Aug 2021$114.3M
12 months to Aug 2022$188.5M
12 months to Aug 2023$168.7M
12 months to Aug 2024$123.4M
12 months to Aug 2025$155.7M
12 months to Aug 2026$142.0M
  • China
  • Austria
  • Canada
  • Germany
  • All countries
Share of US imports
Show the numbers
PeriodChinaAustriaCanadaGermany
12 months to Aug 201740.7%14.7%7.9%10.1%
12 months to Aug 201836.2%12.3%7.1%8.0%
12 months to Aug 201952.5%10.7%6.4%6.5%
12 months to Aug 202037.2%12.5%10.6%7.3%
12 months to Aug 202142.6%13.6%14.5%6.7%
12 months to Aug 202256.7%11.0%8.3%4.7%
12 months to Aug 202350.9%12.6%10.4%6.3%
12 months to Aug 202447.4%16.1%11.9%4.7%
12 months to Aug 202550.4%14.4%10.8%5.0%
12 months to Aug 202650.2%17.3%12.1%3.7%
Duty paid, % of value
Show the numbers
PeriodChinaAustriaCanadaGermanyAll countries
12 months to Aug 20170.1%1.3%0.0%1.3%0.5%
12 months to Aug 20180.3%1.3%0.0%1.3%0.5%
12 months to Aug 20190.2%1.3%0.0%1.3%0.4%
12 months to Aug 202010.7%1.3%0.0%1.2%4.3%
12 months to Aug 20217.6%1.3%0.0%1.1%3.6%
12 months to Aug 20227.5%1.3%0.0%1.2%4.6%
12 months to Aug 20237.6%1.3%0.0%1.2%4.2%
12 months to Aug 20247.7%1.3%0.0%1.2%4.0%
12 months to Aug 202513.3%1.0%0.2%2.1%7.1%
12 months to Aug 202614.4%1.1%0.0%1.2%7.7%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$142.0M−8.8%7.7%+0.6 pts$29.7M−2.1%
12 months to Aug 2025$155.7M+26%7.1%+3.1 pts$30.3M−17%
12 months to Aug 2024$123.4M−27%4.0%−0.2 pts$36.5M−22%
12 months to Aug 2023$168.7M−11%4.2%−0.4 pts$47.0M−28%
12 months to Aug 2022$188.5M+65%4.6%+1.0 pts$65.3M+25%
12 months to Aug 2021$114.3M−14%3.6%−0.7 pts$52.3M+26%
12 months to Aug 2020$133.4M−28%4.3%+3.9 pts$41.6M−41%
12 months to Aug 2019$185.6M+20%0.4%−0.1 pts$70.3M+8.4%
12 months to Aug 2018$154.6M+22%0.5%0.0 pts$64.8M+14%
12 months to Aug 2017$126.4M0.5%$56.9M

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Average prices aren't shown because this product's lines are counted in different units.

CountryUS importsShareAverage priceDuty paidLast 13 months
China$3.3M40.3%+8.1 ptsn/a8.2%−19.5 pts
Austria$2.1M26.1%+8.0 ptsn/a4.4%+4.3 pts
Canada$1.0M12.8%+2.3 ptsn/a0.0%0.0 pts
Germany$383K4.7%+0.5 ptsn/a5.3%+1.3 pts
Bahrain$334K4.1%−0.7 ptsn/a1.1%+1.1 pts
France$221K2.7%−3.2 ptsn/a1.3%+0.8 pts
Hungary$220K2.7%+0.7 ptsn/a1.3%+1.3 pts
Brazil$140K1.7%−12.9 ptsn/a1.3%−0.8 pts
Other countries (8)$382K4.7%−1.4 ptsn/a1.2%+1.2 pts
All countries$8.1M100.0%n/a4.9%−4.6 pts

The 3 largest suppliers had 79.6% of US imports over the last 12 months.

How the market is shifting

Austria gained the most share: 17.3% of US imports over the last 12 months, up from 14.4% in the 12 months before. Brazil lost the most: 1.6%, down from 6.9%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

  • China
  • Austria
  • Canada
  • Germany
  • All countries
Share of US imports
Show the numbers
MonthChinaAustriaCanadaGermany
September 202467.2%8.6%10.8%1.4%
October 202464.5%9.4%11.2%3.1%
November 202470.5%9.0%8.3%1.0%
December 202456.3%11.9%9.1%4.0%
January 202535.2%15.7%22.0%4.2%
February 202546.8%16.8%8.4%5.9%
March 202559.9%16.6%8.7%2.1%
April 202510.3%21.2%14.0%26.1%
May 202537.6%18.5%12.8%6.7%
June 202556.8%11.4%11.1%3.3%
July 202539.7%18.3%9.3%6.3%
August 202532.2%18.2%10.5%4.2%
September 202563.1%11.0%9.5%4.1%
October 202544.9%13.7%14.6%6.7%
November 202557.7%16.9%11.6%3.1%
December 202538.4%23.2%9.6%2.9%
January 202656.4%14.9%13.4%0.9%
February 202625.1%23.8%12.1%9.3%
March 202640.5%28.5%9.2%3.9%
April 202610.1%38.4%17.0%4.5%
May 202644.4%20.0%14.5%5.7%
June 202651.2%12.2%19.7%2.3%
July 202673.4%6.0%6.2%1.5%
August 202640.3%26.1%12.8%4.7%
Duty paid, % of value
Show the numbers
MonthChinaAustriaCanadaGermanyAll countries
September 20247.6%1.3%0.0%1.3%5.3%
October 20247.6%1.3%0.0%1.3%5.2%
November 20247.6%1.3%0.0%1.2%5.6%
December 20244.4%1.3%0.0%1.3%2.8%
January 20257.9%1.3%0.0%1.3%3.2%
February 20258.1%1.3%0.0%1.3%4.3%
March 20257.6%1.3%2.5%1.3%5.1%
April 202528.2%0.7%0.0%1.2%3.6%
May 202527.7%0.7%0.0%5.0%11.1%
June 202527.6%1.3%0.0%3.9%16.1%
July 202527.7%0.4%0.0%2.4%10.5%
August 202527.7%0.1%0.0%4.1%9.5%
September 202527.6%0.0%0.0%0.0%17.5%
October 202527.6%0.0%0.0%0.0%12.5%
November 202518.0%0.0%0.0%0.0%10.9%
December 202517.7%0.0%0.0%0.3%6.8%
January 202617.5%0.1%0.0%0.0%10.4%
February 202615.5%1.4%0.0%1.3%3.9%
March 20267.6%1.3%0.0%1.3%3.7%
April 20268.7%1.4%0.0%1.3%1.8%
May 20261.7%1.3%0.0%2.1%1.3%
June 20267.8%1.3%0.0%1.1%4.3%
July 20267.6%1.3%0.0%2.8%5.9%
August 20268.2%4.4%0.0%5.3%4.9%

Tariff actions touching this product

When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.

  1. December 2025–January 2026 · Duty paid: China 27.7% → 16.6%, all countries 11.5% → 4.0%.
  2. April–June 2025 · Duty paid: China 7.8% → 27.7%, all countries 4.9% → 13.3%.
  3. March 2020 · Duty paid: China 15.2% → 7.6%.
  4. September–October 2019 · Duty paid: China 0.3% → 15.3%, all countries 0.4% → 5.5%.

Federal Register notices from the last 12 months that list this product's tariff codes. A notice can add a duty, exclude products from one or only mention them, so read each for what it changes. Search the Federal Register for 2818.10

Where it enters the US

Main ports of entry over the 12 months to August 2026: US imports and share.

  1. Gramercy, LA$52.6M · 37.0%
  2. Buffalo-Niagara Falls, NY$31.8M · 22.4%
  3. Norfolk-Newport News, VA$9.2M · 6.5%
  4. Newark, NJ$8.7M · 6.1%
  5. Providence, RI$8.7M · 6.1%

Where US exports go

US exports were $2.8M in August 2026, down 0.9% from August 2025, and $29.7M over the last 12 months, down 2.1% on the 12 months before. Fastest-growing market with 3% or more of US exports: United Kingdom, up 8644%.

MarketLast 12 monthsSharevs 12 months before
Canada$7.9M26.7%−8.2%
Mexico$7.7M26.1%−12%
Germany$3.1M10.6%−17%
Austria$1.8M6.2%+1221%
Japan$1.7M5.7%+7.1%
United Kingdom$1.6M5.5%+8644%
Brazil$1.2M4.1%+38%
Thailand$927K3.1%−4.5%
Other countries (30)$3.6M12.0%−24%
All countries$29.7M100.0%−2.1%

Markets abroad

Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 100 have reported 2025 so far. Where a country's figure for imports from the US is under half or over double what the US recorded exporting there that year, the US figure is shown under it.

MarketImportsvs year beforeFrom the USUS share
Germany$144.1Min 2025−5.2%$7.1M5.0%
Japan$134.7Min 2025+17%$1.7M1.3%
Italy$99.6Min 2025+87%$173K0.2%
Korea, South$87.2Min 2025−2.9%$367K0.4%
Austria$82.7Min 2025+2.3%$14.6MUS records $180K17.6%
Turkey$54.3Min 2025−6.0%$157K0.3%
Poland$40.9Min 2025−3.0%$3.3MUS records $185K8.2%
Brazil$30.8Min 2025+94%$1.4M4.5%

The biggest market outside the US is Germany, which imported $144.1M of this product in 2025, 5.0% of that from the US.

Of these, imports into Brazil grew fastest: up 94% from 2024 to 2025.

Other products under heading 2818: artificial corundum, whether or not chemically defined; aluminum oxide; aluminum hydroxide. US trade over the 12 months to August 2026.

ProductUS importsUS exports
Aluminum oxide, except artificial corundum, not elsewhere specifiedHS 2818.20$657.6M$248.2M
Aluminum hydroxideHS 2818.30$302.4M$206.7M
About these figures
  • Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
  • US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
  • Average price is customs value divided by quantity, across all of the product's 10-digit lines.
  • Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
  • Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
  • Tariff notices are from the Federal Register, matched to this product by the HTS numbers in their text.
  • Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.

Try bamboo cutting boards, green coffee or 7318.15