The U.S. Administration has issued a presidential proclamation titled Strengthening Actions to Adjust Imports of Aluminum, Steel, and Copper, introducing significant revisions to existing Section 232 tariff measures on metal imports. Effective April 6, 2026, the proclamation imposes a 50 percent ad valorem tariff on a broad range of steel, aluminum, and certain copper articles.
A key change for compliance professionals is the shift in valuation methodology. The tariff is now applied to the full customs value of the imported product, rather than being limited to the value of the metal content. This represents a material increase in duty exposure, particularly for downstream and manufactured goods incorporating covered metals.
The scope of coverage has also been expanded through updated tariff classifications, requiring companies to carefully reassess product mapping against the Harmonized Tariff Schedule. Importers should review whether finished or semi-finished goods fall within the revised definitions of covered articles, as indirect exposure may increase.
While the measure applies broadly, the proclamation maintains certain country-specific arrangements and exclusions, as well as provisions tied to origin and production processes. These nuances introduce additional complexity in determining eligibility for preferential treatment or reduced rates.
From a compliance perspective, companies should urgently evaluate classification accuracy, valuation practices, and supply chain configurations. Internal systems may require updates to reflect the new duty calculation basis, and procurement strategies should be reassessed in light of increased landed costs.
Overall, the proclamation materially heightens tariff risk and underscores the need for enhanced diligence in U.S. import compliance.
Please refer to the proclamation issued under the Whitehouse on April 2, 2026: