Topline summary: On June 1, 2026, President Trump amended the Section 232 tariff framework for aluminum, steel, and copper. Importers of agricultural, industrial, and mobile equipment may qualify for temporarily reduced rates of 10–15%, while certain furniture parts, lithographic plates, and steel racks are newly dutiable for the first time. With a December 31, 2027, sunset on all temporary reductions, importers should audit their HTS classifications now to avoid overpaying or underpaying.