Aluminum Alloy Bars, Rods, and Non-Hollow Profiles

The distinction typically turns on alloy series: 7xxx-series alloys (such as 7075) are generally treated as high-strength heat-treatable, while 6xxx-series alloys (such as 6061) are classified as standard industrial heat-treatable. The mill certificate's alloy designation and temper are the controlling documents; when the alloy falls on the boundary, a binding ruling from CBP is advisable before large-volume importation.

Beyond Section 232 tariffs, aerospace-grade bars in high-strength alloys may require material traceability documentation (such as AMS or ASTM certifications) demanded by downstream customers rather than by CBP. Some supplier countries also maintain export licensing requirements for aerospace-grade aluminum. Importers should confirm that mill certifications accompany each shipment and that the alloy and temper match the purchase specification to avoid both customs and quality disputes.