Effective April 6, 2026, Section 232 tariffs on aluminum, steel, and copper now apply to the full customs value of imported products. Rates include 50% for metal articles, 25% for metal-heavy derivatives, and 15% transitional through 2027. Latest CBP Guidance provides technical corrections under Annex IV of Proclamation 11021, adding HTS 9903.82.01 for non-metal articles.