The US has maintained antidumping and countervailing duty orders on aluminum extrusions from certain countries. Hollow profiles that fall within the scope of those orders require a separate AD/CVD entry and cash deposit at the applicable rate. Scope is defined by the order itself, and CBP scope rulings have addressed edge cases involving heat-treated alloys and specific end-use configurations — importers should request a scope ruling when product specifications are borderline.

Heat-treatable alloys are those in the 2xxx, 6xxx, and 7xxx series that gain strength through precipitation hardening after extrusion. The industrial designation further narrows to profiles intended for structural or mechanical applications rather than decorative use. Mill certifications identifying the alloy series and temper designation (e.g., T5, T6) are the primary documents used to support classification under 7604210010.