Trump Proclamation Adjusts Tariff Regimes on Aluminum, Steel and Copper Imports

WASHINGTON — President Donald Trump signed Proclamation 11032 on June 1, 2026, directing further adjustments to the tariff regimes governing imports of aluminum, steel, and copper into the United States, according to the Federal Register notice published June 4.

The proclamation, which spans 57 pages, invokes presidential authority under existing trade statutes to alter duty rates and associated rules on these three metals. It applies to a wide range of importers, foreign manufacturers, and U.S. industries that consume aluminum, steel, and copper in sectors including automotive, construction, aerospace, and electrical equipment.

Precise volume and dollar figures are not enumerated in the document itself, but the metals collectively represent billions of dollars in annual U.S. imports and serve as foundational inputs for millions of tons of finished goods produced domestically each year.

The action revises the prior tariff framework established under previous proclamations. It introduces new rate structures, exemptions, and procedural requirements for importers while maintaining the Section 232 national-security legal basis used in earlier adjustments.

The changes take legal effect upon publication and implementation dates specified in the proclamation text, with certain compliance deadlines phased in during the weeks following June 4, 2026.

Downstream, importers must update customs filings and payment calculations to reflect the revised duties, triggering immediate operational adjustments at ports of entry. Domestic producers gain altered competitive conditions against imported material, which in turn affects pricing signals passed to manufacturers of cars, buildings, pipelines, and power infrastructure.

Federal agencies including Customs and Border Protection and the Commerce Department must issue updated enforcement guidance and reporting templates within the timelines set by the proclamation, while affected companies face new documentation burdens to qualify for any revised exemptions or quotas.

This is the latest in a series of presidential proclamations refining metal tariffs that began with the initial Section 232 measures in 2018. The Federal Register notice details the specific tariff-rate modifications, product lists, and country-specific treatments now in force under Proclamation 11032.

Primary sources: Federal Register · Proclamation 11032