Flat-rolled aluminum — encompassing heavy plates used in aerospace and marine structures, sheet stock for automotive body panels and building products, and thin foil for packaging — is one of the most actively traded fabricated aluminum forms in US commerce. NAICS 331315 covers the rolling mills that produce these products from cast slabs, and the resulting goods span a wide range of tempers, alloy series, and thickness tolerances that determine end-use suitability. Section 232 tariffs apply to imported flat-rolled aluminum, and antidumping or countervailing duty orders on specific flat-rolled products from certain origins add another layer of duty exposure that importers must evaluate at the HTS line level.

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