CDA 521 Phosphor Bronze Strip 5.5mm
CDA 521 grade phosphor bronze strip at 5.5mm thickness, featuring 8% tin and 0.2% phosphorus for excellent fatigue resistance. Classified in HTS 7409.39.10.30 for its phosphor bronze alloy, copper-tin base, and thickness over 5mm. Used in electrical contacts and diaphragms requiring high strength.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other bronze alloy, not phosphor
Non-phosphor copper-tin bronzes use a separate subheading within the thick bronze category.
If phosphor bronze but <0.15mm thick
Very thin phosphor bronze foil shifts to the Chapter 74 thin strip/foil heading.
If copper-nickel-zinc (nickel silver)
Alloys with ≥5% nickel become nickel silvers, changing the base alloy classification.
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Import Tips & Compliance
• Reference ASTM B103 standard in documentation to validate CDA 521 phosphor bronze composition
• Measure thickness precisely at multiple points; slight variations could trigger reclassification
• Include end-use statements if for defense applications to comply with ITAR export controls on import
Related Products under HTS 7409.39.10.30
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A flat phosphor bronze sheet measuring 6mm in thickness, made from copper-tin base alloy with phosphorus addition for enhanced strength and corrosion resistance. Classified under HTS 7409.39.10.30 due to its bronze composition, thickness exceeding 5mm, and phosphor bronze specification. Commonly used in heavy-duty industrial applications requiring durability.
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