U.S. Updates Section 232 Tariffs on Steel, Aluminum and Copper

Summary

On 1 June 2026, the White House issued a proclamation modifying Section 232 tariff regimes for imports of aluminum, steel and copper into the United States. The update expands 15% tariff eligibility, revises U.S. content rules and adjusts scope and administration of the duties. The changes affect metal-intensive supply chains and downstream manufacturers, adding another layer of cost uncertainty alongside existing IEEPA and Section 301 tariff programs.