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Constantan Unwrought Wire Alloy

Unwrought form of Constantan (55% Cu, 45% Ni) resistance alloy for thermocouples and resistors. Copper-nickel base alloy under HTS 7403.29.0110 with nickel nearly equal but predominant over others.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China1%+25.0%26%
🇲🇽Mexico1%—1%
🇨🇦Canada1%—1%
🇩🇪Germany1%—1%
🇯🇵Japan1%—1%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

7408.11Lower: 15.5% vs 26%

If drawn into wire form

Clad or worked wire shifts to wrought categories.

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

• Distinguish unwrought pellets from drawn wire (7413)

• Electrical resistivity specs aid classification