Constantan Bare Wire for Strain Gauges
High-precision bare constantan (cupro-nickel alloy) wire for strain gauge sensors in engineering applications. It falls under tariff item 7408.22.00 as uncoated wire of copper-nickel base alloys, meeting the definition of copper-nickel base alloys with nickel content at least 5% and zinc not exceeding 1%.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
PGA flags
No agency flag on this HTS number in the CBSA Single Window matching criteria.
CBSA Single Window matching criteria, unknown
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the wire is made of refined copper rather than a copper-nickel alloy
Refined copper wire falls under a different subheading.
If the alloy is a copper-tin bronze or other copper alloy
Other copper alloy wires are classified separately.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the constantan alloy composition meets the copper-nickel base alloy definition (nickel ≥5%, zinc ≤1%)
• Provide a certificate of analysis to confirm the alloy composition for CBSA
• Declare the wire's diameter and coil form, as these are relevant to the wire definition
Related Products under Tariff item 7408.22.00
Cupro-Nickel 70/30 Wire for Heat Exchangers
Bare 70/30 cupro-nickel wire used in condenser tube supports and heat exchanger components. It falls under tariff item 7408.22.00 as uncoated wire of copper-nickel base alloys, with the 70/30 composition meeting the copper-nickel base alloy definition.
Cupro-Nickel Annealed Wire for Marine Hardware
Soft-annealed bare cupro-nickel wire (90/10 alloy) for corrosion-resistant marine fasteners and rigging. It falls under tariff item 7408.22.00 as uncoated wire of copper-nickel base alloys, with the 90/10 composition meeting the copper-nickel base alloy definition.
Cupro-Nickel Coated Electrical Wire
This is a thin wire made from a copper-nickel base alloy (cupro-nickel), coated with a layer of silver for enhanced conductivity and corrosion resistance. It falls under tariff item 7408.22.00 because it is wire of copper-nickel base alloys, and the silver coating does not change its classification as a copper alloy wire.
Cupro-Nickel Fine Wire for Medical Sensors
Ultra-fine bare cupro-nickel wire for biomedical temperature sensors and implants. It falls under tariff item 7408.22.00 as uncoated wire of copper-nickel base alloys, meeting the definition of copper-nickel base alloys with nickel content at least 5% and zinc not exceeding 1%.
Cupro-Nickel Palladium-Plated Precision Wire
Ultra-fine cupro-nickel wire with palladium plating for catalytic converter sensors and hydrogen fuel cells. It falls under tariff item 7408.22.00 as wire of copper-nickel base alloys, and the palladium plating does not alter its classification as a copper alloy wire.
Cupro-Nickel Resistance Wire AWG 24
Bare cupro-nickel alloy wire (e.g., constantan composition) used for electrical resistors and heating elements due to its high resistivity. It falls under tariff item 7408.22.00 as uncoated wire of copper-nickel base alloys, meeting the definition of copper-nickel base alloys.