7408.22 - Of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver):

This HTS category, 7408.22, specifically addresses copper wire manufactured from copper-nickel base alloys (commonly known as cupro-nickel) or copper-nickel-zinc base alloys (also referred to as nickel silver). These alloys are characterized by their distinct metallic properties, often imparted by the presence of nickel, which can enhance corrosion resistance and mechanical strength compared to pure copper. The wire in this classification is typically used in applications requiring these enhanced properties, such as in marine environments, electrical components, or decorative metalwork.

Distinguishing this category from its sibling, 7408.21.00.00 (copper wire of copper-zinc base alloys, i.e., brass), is the primary alloying element. While both are copper alloys, the presence of nickel in significant quantities in cupro-nickel and nickel silver forms the basis for their separate classification under 7408.22. The "Other" category at this level (7408.29) would encompass copper alloy wires not falling into the specific brass, cupro-nickel, or nickel silver designations.

Within the 7408.22 classification, further distinctions are made based on the surface treatment of the wire. The subcategories differentiate between wire that has been coated or plated with metal (7408.22.10.00) and wire that has not undergone such surface treatments (7408.22.50.00). This distinction is crucial for accurate classification, as the presence of a metallic coating can alter the wire's properties and intended use, impacting duty rates and import/export regulations.