Summary: Effective April 6, 2026, a new U.S. Presidential Proclamation has modified Section 232 tariffs. The 50% tariff now applies to the full customs value of aluminum articles (HTSUS Chapter 76), closing a previous loophole where importers only paid on the raw metal content. For extruders using U.S.-smelted and cast inputs, a reduced 10% rate applies, incentivizing domestic sourcing.

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https://www.whitehouse.gov