Other Nonferrous Metal Foundries (Except Die-Casting)

Both bronze (copper-tin base) and brass (copper-zinc base) castings are classified as copper alloy articles under HTS Chapter 74, but the specific subheading depends on the alloy composition and the article's form or function. Importers should obtain a certified alloy analysis (showing copper, tin, zinc, and other element percentages) from the foundry, as the copper content threshold and alloying elements determine the correct HTS provision and whether any antidumping or countervailing duty orders on copper alloy products apply.

While the casting method (sand, permanent mold, investment) does not typically change HTS classification, it is relevant for buyer qualification and country-of-origin verification. Foundry process records — including mold type, pour temperature logs, and heat treatment records — support ASTM or EN material certifications and demonstrate that the casting was produced (not merely machined or finished) in the declared country of origin, which matters when trade-remedy orders are in scope.