Constantan Nickel-Copper Wire from Canada
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 — Canada → United States
12.6%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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