High Purity Annealed Copper Sheet Coil 3.5mm
Annealed refined copper sheets in coils, 3.5 mm thick, for heat exchanger fins and bus conductors. HTS 7409.11.50 covers this refined copper product in coils under 5 mm. Annealing softens for better formability while maintaining 99.9%+ purity.
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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 copper-zinc base alloys (brasses) in coils
Brass coils under 5 mm use 7409.91 per zinc-dominant alloy definition in note (a).
If unwrought refined copper cathodes
Unwrought forms like cathodes/blister copper precede worked plates in Chapter 74 sequence.
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Import Tips & Compliance
• Specify annealing condition (soft/half-hard) in docs; affects fabrication but not HTS classification
• Measure thickness uniformly across coil; variations near 5 mm trigger higher duty brackets
• Ensure no cladding; clad products shift to 7410
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