Constantan Bare Wire for Strain Gauges
High-precision bare constantan (cupro-nickel alloy) wire for strain gauge sensors in engineering applications. HTS 7408.22.50.00 due to copper-nickel base composition, uncoated.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If oxygen-free high conductivity copper
Non-alloy high-purity wire for precision uses classified separately.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide resistivity (typically 48-50 μΩ·cm) and elongation data to confirm strain gauge grade
• Ultra-fine diameters (<0.1mm) require special handling declarations
• Distinguish from foil forms—wire only under 7408
Related Products under HTS 7408.22.50.00
Cupro-Nickel Thermocouple Wire Type T
This is a bare cupro-nickel wire used in Type T thermocouples for temperature measurement in industrial and laboratory settings. It falls under HTS 7408.22.50.00 as it is made from copper-nickel base alloys (with nickel predominating over other elements and zinc under 1%) and is not coated or plated with metal.
Nickel Silver Bare Round Wire 0.5mm
Bare round wire made from copper-nickel-zinc base alloy (nickel silver) with ≥5% nickel, used in precision instruments and jewelry findings. Classified under HTS 7408.22.50.00 due to its uncoated copper-nickel-zinc composition meeting subheading note (c).
Nickel Silver Square Wire for Springs 1mm
Uncoated square-profile nickel silver wire used in manufacturing small mechanical springs and contacts. Falls under HTS 7408.22.50.00 for bare copper-nickel-zinc base alloy wire.
Nickel Silver Flat Wire for Electrical Contacts
Rectangular bare nickel silver wire for stamped electrical connectors and switch contacts. Classified in HTS 7408.22.50.00 as uncoated copper-nickel-zinc base alloy wire.
Cupro-Nickel 70/30 Wire for Heat Exchangers
Bare 70/30 cupro-nickel wire used in condenser tube supports and heat exchanger components. Falls under HTS 7408.22.50.00 as uncoated copper-nickel base alloy wire.
Nickel Silver Watch Spring Wire
Precision-drawn bare nickel silver wire for hairsprings in mechanical watches. HTS 7408.22.50.00 for its uncoated copper-nickel-zinc base alloy properties.