Constantan Nickel-Copper Wire from Mexico
Constantan (55% copper, 45% nickel) wire provides stable electrical resistance for precision thermocouples and strain gauges. Though copper-rich, nickel alloy status and non-cold-formed processing classify it under HTS 7505.22.50.00.
Duty Rate — Mexico → United States
12.6%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Thermocouple type (Type J, T) designation helps verify alloy composition
• Provide resistivity curves confirming constantan properties vs generic alloys
• Copper content can trigger secondary review for Chapter 74 classification