Section 232 Updates Reshape the Metal Import Landscape
The U.S. government has once again expanded its trade measures on imported metals, introducing major changes to tariffs on aluminum, steel, copper, and products made from those materials.
In a pair of proclamations issued in April and June 2026, the Trump administration strengthened existing Section 232 tariffs, arguing that foreign imports continue to pose a risk to America’s industrial base and national security. The changes increase tariff rates, expand the list of affected products, tighten enforcement rules, and encourage manufacturers to source more materials from U.S. producers.
For businesses that import, manufacture, or rely on metal-intensive products, these updates could have significant implications.
Background: Why the United States Is Taking Action
Since 2018, the federal government has maintained that excessive imports of aluminum and steel threaten the nation’s industrial base and, by extension, its national security. In 2025, similar concerns led to the expansion of Section 232 protections to include copper.
According to the Department of Commerce, the tariff programs have helped strengthen domestic production. The administration reports that:
Aluminum production capacity utilization increased from approximately 39% in 2017 to more than 50% in 2026.
Steel production capacity utilization rose from roughly 72% in 2017 to over 77% in 2026.
Domestic producers have increased investment, workforce development, and manufacturing capabilities.
The administration argues that these improvements would not have occurred without the tariff protections established under Section 232.
Key Changes Introduced in April 2026
On April 2, 2026, President Trump issued Proclamation 11021, titled Strengthening Actions Taken To Adjust Imports of Aluminum, Steel, and Copper Into the United States. The proclamation introduced several major changes.
1. Tariffs Apply to Full Customs Value
One of the most significant modifications is that tariffs now apply to the full customs value of covered products rather than only the value of their metal content.
This change is intended to eliminate opportunities for importers to reduce tariff liability by manipulating product classifications or minimizing declared metal content.
2. Increased Tariff Rates
The proclamation establishes the following tariff rates for covered imported metal products:
50% Ad Valorem Tariff Rate – Generally applies to:
- Aluminum articles
- Steel articles
- Most copper articles
- Certain aluminum and steel derivative products
25% Tariff Rate – Generally applies to:
- Certain copper products
- Various aluminum and steel derivative articles
Reduced Rates – Available for:
- Products from the United Kingdom under specific sourcing requirements
- Products manufactured entirely with U.S.-origin aluminum, steel, or copper
- For qualifying products made with American metals, tariffs can be reduced to as low as 10%.
3. New Authority to Expand Product Coverage
The administration terminated the previous derivative inclusion process and granted new authority to the Secretary of Commerce and the U.S. Trade Representative.
These officials may now jointly add derivative products to the tariff lists whenever imports threaten national security or undermine the objectives of the Section 232 program.
This authority allows faster responses to changing market conditions and attempts to circumvent tariffs.
The administration says these changes are designed to close loopholes that allowed some importers to avoid higher duties.
Adjustments Made in June 2026
After reviewing feedback from industry stakeholders and monitoring economic conditions, the administration issued another proclamation on June 1, 2026. While the administration increased tariffs overall, it also acknowledged that some sectors depend heavily on metal-intensive equipment.
As a result, several categories of products will receive temporary tariff relief through the end of 2027.
Agricultural Equipment
Farm equipment has been added to a lower-duty category.
The administration noted that farmers rely on these machines to maintain food production and that sharply increasing costs could create challenges throughout the agricultural sector.
Residential HVAC Systems
Certain residential heating and cooling systems, along with related components, will also qualify for reduced tariff treatment.
This move appears aimed at limiting cost increases for homeowners and builders.
Industrial Machinery and Equipment
Some mobile industrial equipment, construction machinery, and material-handling systems will receive temporary tariff adjustments as well.
The goal is to support manufacturers, warehouses, logistics operations, and factories that depend on these products to keep operations running efficiently.
New Products Added to Tariff Coverage
The administration also expanded coverage to include additional derivative products.
Notable additions include:
- Aluminum lithographic plates
- Steel racks
Officials argued that excluding these products created opportunities for tariff circumvention and weakened the effectiveness of the existing program.
Incentives for Using American Metals
The administration is also trying to encourage companies to buy more U.S.-produced aluminum, steel, and copper.
Previous Standard
Products generally needed:
- 95% U.S.-origin aluminum
- 95% U.S.-origin steel
- 95% U.S.-origin copper
New Standard
Beginning June 2026, products qualify if:
- At least 85% of the metal content originates from U.S. smelting, casting, melting, or pouring operations
In other words, manufacturers can incorporate a small amount of foreign metal while still qualifying for favorable tariff rates, making it easier to source domestically while maintaining flexibility in production.
What About Canada, Mexico, and Other Trading Partners?
The proclamations include various country-specific provisions.
Canada and Mexico
Products that qualify under the USMCA trade agreement receive special treatment. In many cases, tariffs will apply only to the non-U.S. portion of the product’s value.
This approach is intended to recognize the deeply integrated North American manufacturing supply chain.
United Kingdom
The United Kingdom receives reduced tariff rates when products meet strict sourcing requirements, demonstrating that the metal was produced within the UK.
European Union, Japan, South Korea, and Others
Certain industrial equipment imported from designated trading partners may qualify for reduced effective tariff rates during the temporary relief period extending through December 31, 2027.
Russia
Imports involving Russian aluminum continue to face a 200% tariff rate.
This includes products:
- Manufactured in Russia
- Containing aluminum smelted in Russia
- Containing aluminum cast in Russia
Stronger Enforcement Is Coming
The administration is placing a major emphasis on enforcement. Customs officials have been directed to crack down on practices such as:
- Mislabeling country of origin
- Illegal transshipment through third countries
- Undervaluing imports
- Misrepresenting metal content
Importers will also be required to provide more detailed documentation about where metals were smelted, cast, melted, or poured.
For companies importing metal products, recordkeeping and compliance are likely to become even more important.
Economic and National Security Objectives
The administration states that the revised tariff framework serves several strategic goals:
Strengthening Domestic Manufacturing
Higher tariffs are intended to encourage investment in American aluminum, steel, and copper production.
Reducing Foreign Dependence
Officials argue that relying heavily on foreign metal suppliers creates vulnerabilities during geopolitical conflicts, supply-chain disruptions, and national emergencies.
Supporting the Defense Industrial Base
Many defense systems require specialized metal products. Maintaining domestic production capabilities is viewed as critical to military readiness.
Encouraging Research and Development
The administration believes stronger domestic industries will invest more heavily in advanced manufacturing technologies and innovation.
Expanding Employment Opportunities
By promoting domestic production, policymakers expect increased demand for skilled workers in mining, smelting, refining, manufacturing, and related sectors.
Looking Ahead
The Department of Commerce and the U.S. Trade Representative have been directed to continue monitoring imports and evaluating the effectiveness of the tariff programs. A formal review process remains in place, and officials are authorized to recommend additional actions if national security concerns persist.
As global supply chains continue to evolve, these proclamations represent one of the most significant expansions of U.S. trade protections for strategic metals in recent history. Whether the measures ultimately deliver long-term benefits for American industry while minimizing costs for downstream manufacturers will remain a central question for policymakers, businesses, and consumers in the years ahead.
What Does This Mean for Businesses?
For domestic metal producers, the changes are expected to provide additional protection from foreign competition and potentially encourage new investment in U.S. production facilities.
For manufacturers and importers, however, the picture is more complicated.
Some businesses may see higher material costs, especially if they rely heavily on imported metals or imported equipment. Others may adjust supply chains, source more materials domestically, or take advantage of the reduced rates available for products containing mostly U.S.-origin metal.
Either way, these tariff changes represent one of the most significant expansions of U.S. trade protections in recent years.
Final Thoughts
The 2026 proclamations significantly reshape the United States’ approach to aluminum, steel, and copper imports as part of its broader economic and national security strategy.
By raising tariffs, expanding product coverage, and tightening enforcement, the administration hopes to strengthen American manufacturing and reduce dependence on foreign suppliers. At the same time, targeted relief for industries such as agriculture, HVAC, and industrial equipment shows an effort to balance protectionist policies with the practical needs of businesses and consumers.
As companies evaluate the impact of these changes, one thing is clear: metal sourcing decisions, import strategies, and supply chain planning are becoming more important than ever. Do you find deciphering the revised Section 232 tariffs confusing? Would you like help in determining if your product is subject to the Section 232 tariffs or what additional duty percentage your goods will have due to Section 232? You don’t have to struggle alone. Schedule a no-charge consultation with one of our trade compliance professionals today.
Shawna Karajic is a Senior Consultant for Export Solutions -- a full-service consulting firm specializing in U.S. import and export regulations.