Parts for machinery, plant or laboratory equipment for the treatment of material involving temperature change (except domestic machinery), not elsewhere specified

US trade by year

US imports were $2.14B in the 12 months to Aug 2026, up 127% on the 12 months to Aug 2017. US exports were $880.6M, up 18%. In January 2022 the HS 2022 revision moved some goods between this code and 8524.11, 8524.12, 8524.19 and 10 more, so part of a change across the dashed line can be the revision. 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
• Mexico
• Taiwan
• Canada
• All countries

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Landed cost by origin, below, adds freight and duty to the price.

The 3 largest suppliers had 44.2% of US imports over the last 12 months.

Landed cost by origin

What importers paid to land this product at a US port from each main supplier, June–August 2026: the price, freight and insurance to the first US port, and duty, per unit. Suppliers with 3% or more of these imports, cheapest landed first. Small figures under landed cost are the change from the same months a year earlier.

• Price
• Freight and insurance
• Duty

Landed at a US port, India was cheapest, at $11.08/kg: 0.9% below Mexico.

China had the lowest price before freight and duty, $8.96/kg, but they added 46.0% to it.

Landed cost from Taiwan rose 269% on a year earlier, to $98.78/kg, mostly on price: $22.16/kg then, $82.27/kg now.

How the market is shifting

Taiwan gained the most share: 12.5% of US imports over the last 12 months, up from 5.1% in the 12 months before. Japan lost the most: 2.2%, down from 4.3%. 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
• Mexico
• Taiwan
• Canada
• All countries

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. January–March 2026 · Duty paid: China 43.5% → 26.9%, Taiwan 21.8% → 12.0%, Switzerland 38.1% → 14.4%, all countries 18.4% → 11.0%.
   • Implementing Certain Tariff-Related Elements of the Framework for a United States-Switzerland-Liechtenstein Agreement on Fair, Balanced, and Reciprocal TradeDec 18, 2025 · International Trade Administration
   • Implementing Certain Tariff-Related Elements of the U.S.-Korea Strategic Trade and Investment DealDec 4, 2025 · International Trade Administration
2. August 2025 · Duty paid: Switzerland 12.4% → 38.1%.
   • Imports of Automobiles, Automobile Parts, Civil Aircraft and Civil Aircraft Parts From the United Kingdom Under Executive Order 14309Jun 30, 2025 · International Trade Administration
3. March–May 2025 · Duty paid: China 16.7% → 46.5%, Taiwan 1.4% → 11.9%, Canada 1.3% → 7.8%, Germany 2.3% → 11.3%, Switzerland 3.3% → 8.6%, all countries 3.8% → 15.2%.
   • Implementation of Duties on Aluminum Pursuant to Proclamation 10895 Adjusting Imports of Aluminum Into the United StatesMar 5, 2025 · Bureau of Industry and Security
4. December 2021 · Duty paid: China 24.0% → 18.4%. This is around the January 2022 HS revision, which moved goods in or out of this code.
5. January 2021 · Duty paid: China 12.4% → 25.1%.
   • Aluminum Extrusions From the People's Republic of China: Final Results of Countervailing Duty Administrative Review and Rescission of Review, in Part; 2018Jan 22, 2021 · International Trade Administration
6. July 2018 · Duty paid: China 1.1% → 21.1%.
   • Aluminum Extrusions From the People's Republic of China: Final Results of Antidumping Duty Administrative Review and Final Determination of No Shipments; 2016-2017Jul 27, 2018 · International Trade Administration
   • Aluminum Extrusions From the People's Republic of China: Final Results of Countervailing Duty Administrative Review; 2016Jul 25, 2018 · International Trade Administration
   • Aluminum Extrusions From the People's Republic of China: Initiation and Preliminary Results of Expedited Changed Circumstances ReviewJul 20, 2018 · International Trade Administration

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. These are the 5 newest of 8. Search the Federal Register for 8419.90

• Aluminum Extrusions From the People's Republic of China: Final Results of Countervailing Duty Administrative Review; 2024Aug 11, 2026 · International Trade Administration
• Request for Public Comments on the Proposed Implementation of Duties on Additional Aluminum, Steel, and Copper Derivative Articles Under Section 232Aug 6, 2026 · Bureau of Industry and Security
• Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal DeforestationJul 20, 2026 · Office of the US Trade Representative
• Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal DeforestationJun 4, 2026 · Office of the US Trade Representative
• Implementing Certain Tariff-Related Elements of a Trade and Security Agreement Between the American Institute in Taiwan and the Taipei Economic and Cultural Representative Office in the United StatesMay 28, 2026 · Office of the US Trade Representative

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; 123 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.

The biggest market outside the US is Germany, which imported $505.0M of this product in 2025, 4.2% of that from the US.

The US supplies 50.7% of imports into Canada and 30.6% into Mexico, but under 10% into Germany, the Netherlands and Japan.

Of these, imports into France grew fastest: up 24% from 2024 to 2025.

Related products

Other products under heading 8419: machinery or equipment for the treatment of materials by a change of temperature; instantaneous or storage water heaters, nonelectric; parts thereof. US trade over the 12 months to August 2026.