Section 232 Expands to Copper; UK Pharma Tariffs Drop to Zero

Key Points

• The Department of Commerce is seeking public comments on a proposal to bring 14 new derivative article categories, spanning steel, aluminum, and copper products, within the scope of Section 232 duties.
• Newly proposed categories include brass-wind musical instruments and their parts, aluminum powder, fire extinguishers, tanker trailers and semi-trailers, self-propelled cranes, and several other industrial goods.
• The comment notice was published in the Federal Register on August 6, 2026, giving affected importers and manufacturers a formal window to submit views before any final action is taken.
• Separately, a Federal Register notice published August 4, 2026 confirms that tariffs on patented pharmaceuticals and associated pharmaceutical ingredients from the United Kingdom have been reduced from 10 percent to zero percent under Presidential Proclamation 11020.
• UK pharma importers should immediately verify that their entries reflect the new zero-percent rate to avoid overpaying duties.

On this page

1. What changed: two separate tariff developments
2. Section 232 expansion: proposed derivative articles and product scope
3. UK pharmaceutical tariff reduction: rate change and legal basis
4. Dates and applicability
5. What importers, brokers, and compliance teams should do now
6. Key references

Two significant tariff developments emerged in the first week of August 2026. First, the Commerce Department published a request for public comments on adding 14 derivative product categories to the Section 232 duty framework covering steel, aluminum, and copper. Second, a separate Federal Register notice confirms that patented pharmaceuticals and pharmaceutical ingredients originating in the United Kingdom now carry a zero-percent tariff rate, reduced from 10 percent, pursuant to Presidential Proclamation 11020. The links in this article go to the primary documents: the Federal Register notices and proclamation themselves. Read the source.

What changed: two separate tariff developments

These two actions are independent of each other, but both carry immediate compliance implications. The Section 232 derivative-article proposal is still in a comment phase, meaning no duty change is in effect yet, but the product scope under consideration is broad enough that many importers across multiple industries need to pay attention now. The UK pharmaceutical rate reduction, by contrast, is already in force and requires immediate action on open and future entries.

Section 232 expansion: proposed derivative articles and product scope

The Commerce Department notice proposes extending Section 232 duties to 14 additional derivative article categories. The current Section 232 framework already imposes duties on steel mill products, aluminum products, and, more recently, copper products. This proposal would expand the derivative-article tier of that framework to include:

• Aluminum powder
• Brass-wind musical instruments and their parts and accessories
• Parts of welding machines and apparatus
• Floor safes
• Certain electric conductor cables
• Fire extinguishers
• Parts of heat exchange units
• Parts of certain hydraulic engines and motors
• Certain self-propelled cranes, mobile lifting frames, and straddle carriers
• Tanker trailers and semi-trailers
• Self-loading or self-unloading trailers and semi-trailers

The proposal covers articles derived from steel, aluminum, and copper, reflecting the administration's expansion of Section 232 authority into the copper supply chain. Importers of any of these goods, and domestic manufacturers who compete with imports of these goods, are the primary audiences for the comment process.

A comment period is open. Submitting comments is one of the only formal opportunities to put facts about your supply chain, cost structure, or lack of domestic substitutes on the official record before any final proclamation is issued.

UK pharmaceutical tariff reduction: rate change and legal basis

The Federal Register notice published August 4, 2026 revises the tariff rate on patented pharmaceuticals and associated pharmaceutical ingredients that are products of the United Kingdom from 10 percent to zero percent. The reduction is implemented under Presidential Proclamation 11020, titled "Adjusting Imports of Pharmaceuticals and Pharmaceutical Ingredients Into the United States."

The notice specifically covers patented pharmaceuticals and their associated pharmaceutical ingredients. Importers of UK-origin pharmaceutical products should confirm whether their specific goods fall within the patented-product definition as stated in Proclamation 11020 before claiming the zero rate.

Dates and applicability

The Section 232 derivative-article comment notice was published on August 6, 2026. No effective date for any duty change has been announced; the proposal remains subject to the comment process and any subsequent presidential proclamation. The UK pharmaceutical tariff reduction notice was published on August 4, 2026. The notice itself implements the rate as revised, so importers should treat zero percent as the operative rate for qualifying UK-origin patented pharmaceuticals from that date forward, subject to the specific terms of Proclamation 11020.

What importers, brokers, and compliance teams should do now

• Review your HTS classifications against the 14 proposed derivative-article categories in the Commerce notice. If any of your imported goods appear in the list, assess your Section 232 exposure and consider filing comments with supporting cost and sourcing data before the comment period closes.
• If you import patented pharmaceuticals or pharmaceutical ingredients from the United Kingdom, update your entry process to apply the zero-percent rate and review any entries filed at 10 percent since the effective date of Proclamation 11020 for potential duty refund or protest opportunities.
• Confirm product eligibility for the UK pharma zero rate by reading the specific product definitions in Proclamation 11020 and the August 4 Federal Register notice before claiming the reduced rate.
• Set a monitoring alert for any follow-on Federal Register notice or presidential proclamation finalizing the Section 232 derivative-article expansion, as that action would set a binding effective date and duty rates.

Key references

• Federal Register, August 6, 2026: Request for Public Comments on Proposed Section 232 Duties on Additional Aluminum, Steel, and Copper Derivative Articles
• Federal Register, August 4, 2026: Notice of Reduction of Tariffs on Patented Pharmaceuticals and Pharmaceutical Ingredients for Products of the United Kingdom (Proclamation 11020)
• Federal Register landing page for monitoring follow-on notices
• Harmonized Tariff Schedule of the United States (USITC) for HTS classification reference