Aluminum plates, sheets, and strip with a thickness exceeding 0.2 mm fall under 7606. Aluminum foil — whether backed or not — with a thickness of 0.2 mm or less (excluding any backing) is classified under 7607. The 0.2 mm threshold is measured on the aluminum itself, not including any paper, plastic, or other backing material.

Section 232 tariffs on aluminum apply broadly, but certain countries have negotiated quota-based exemptions or alternative arrangements that modify the standard treatment. Canada has had a distinct arrangement. Because the terms of these arrangements change through executive action, importers should verify the current proclamation and any applicable quota status for their specific supplier country and tariff line before filing entry.