Constantan Bare Wire for Strain Gauges
This is a high-precision bare constantan (cupro-nickel alloy) wire used for strain gauge sensors in engineering applications. It is classified under tariff item 7408.22.00 as wire of copper-nickel base alloy, and being uncoated does not change its classification.
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 |
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 of refined copper rather than a copper-nickel alloy
Refined copper wire is classified under a different tariff item.
If the wire is of a copper alloy other than cupro-nickel or nickel silver
Other copper alloy wires are covered by this alternative.
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 wire's alloy is a copper-nickel base alloy, with nickel predominating over other elements except copper, to meet the tariff item's definition
• Since the wire is bare, no coating declarations are needed, but alloy composition must be documented
• Keep supplier certificates to confirm the constantan composition for CBSA
Related Products under Tariff item 7408.22.00
Cupro-Nickel 70/30 Wire for Heat Exchangers
This is a bare 70/30 cupro-nickel wire used in condenser tube supports and heat exchanger components. It falls under tariff item 7408.22.00 as wire of copper-nickel base alloy, and its uncoated state does not affect its classification.
Cupro-Nickel Annealed Wire for Marine Hardware
This is a soft-annealed bare cupro-nickel wire (90/10 alloy) used for corrosion-resistant marine fasteners and rigging. It is classified under tariff item 7408.22.00 as wire of copper-nickel base alloy, with annealing not affecting its classification.
Cupro-Nickel Coated Electrical Wire
This is a thin wire made from a copper-nickel base alloy (cupro-nickel) and coated with a layer of silver to improve conductivity and resist corrosion. It is classified under tariff item 7408.22.00 because it is a wire of copper-nickel base alloy, regardless of the silver plating.
Cupro-Nickel Fine Wire for Medical Sensors
This is an ultra-fine bare cupro-nickel wire used for biomedical temperature sensors and implants. It falls under tariff item 7408.22.00 as wire of copper-nickel base alloy, and its uncoated state does not change its classification.
Cupro-Nickel Palladium-Plated Precision Wire
This is an ultra-fine cupro-nickel wire plated with palladium, used in catalytic converter sensors and hydrogen fuel cells. It falls under tariff item 7408.22.00 as wire of copper-nickel base alloy, with the palladium plating not affecting its classification.
Cupro-Nickel Resistance Wire AWG 24
This is a bare cupro-nickel alloy wire (e.g., constantan composition) used for electrical resistors and heating elements due to its high resistivity. It is classified under tariff item 7408.22.00 as wire of copper-nickel base alloy, and being uncoated does not affect its classification.