Bars, Rods, and Profiles of Brass (Copper-Zinc Alloys)

Low-fuming brazing rods of brass are specifically provided for at 7407215000 within this heading. They differ from welding wire in that brazing rods join metals at temperatures above 450°C but below the base metal's melting point, using capillary action rather than fusion welding. Welding wire and electrodes are generally classified in Chapter 83. If a product is marketed as both a brazing rod and a welding consumable, the specific composition and intended use should be reviewed with a customs broker.

The defining characteristic is a copper-zinc base: the alloy must have zinc as the principal alloying element after copper. Common commercial grades include C36000 (free-machining brass) and C26000 (cartridge brass). If the alloy contains nickel as a significant secondary element (cupro-nickel) or has a tin base (bronze), it would fall under 7407.29 rather than 7407.21. Mill certifications confirming alloy composition are standard supporting documents for entry.