Phosphor Bronze C51000 Coil Sheet 6mm Thick
Phosphor bronze C51000 is a copper-tin base alloy (Cu-Sn 5%) commonly used for heavy-duty springs and electrical contacts. This product is supplied in coils with a thickness of 6 mm, exceeding the 5 mm threshold for HTS 7409.31.10.00. It meets the subheading note definition for bronzes where tin predominates over other elements.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If copper-zinc brass alloy instead of copper-tin bronze
Brass alloys where zinc predominates shift to 7409.21 per subheading note (a), not bronze.
If supplied in straight lengths rather than coils
Non-coiled plates/sheets of bronze fall under 7407.22, as 7409 is specific to coiled forms.
If thickness under 5 mm but still in coils
Coiled bronze sheets 0.15-5 mm thick are classified in 7409.39.10.00 based on thickness subheading.
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Import Tips & Compliance
• Obtain mill test certificate confirming tin content > zinc and meeting bronze alloy definition per chapter notes
• Declare exact thickness and alloy grade (e.g
• UNS C51000) to avoid reclassification to thinner gauges
• Check for anti-dumping duties on specific bronze alloys from certain origins
Related Products under HTS 7409.31.10.00
Aluminum Bronze C95400 Coil Strip 8mm Thick
C95400 aluminum bronze (Cu-Sn-Al alloy with tin predominant) is used in marine propellers and heavy wear parts. This 8 mm thick coiled sheet qualifies under HTS 7409.31.10.00 as a copper-tin base alloy per subheading note (b), despite aluminum presence since tin > other elements.
Leaded Tin Bronze C93200 Coil Plate 5.5mm Thick
C93200 SAE 660 bearing bronze (Cu-Sn-Pb) in 5.5 mm coiled form for heavy bearings and bushings. Classifies under HTS 7409.31.10.00 as copper-tin base alloy where tin predominates, with lead as permitted addition.
Silicon Bronze C65500 Coil Sheet 7mm Thick
C65500 silicon bronze (Cu-Sn-Si low tin) heavy coil for weld wire and fasteners. At 7 mm thick in coils, it falls under HTS 7409.31.10.00 provided tin predominates over silicon per bronze definition.
Gunmetal Bronze C90500 Coil 10mm Thick
Traditional gunmetal C90500 (88Cu-10Sn-2Zn) heavy coiled plate for valves and fittings. Qualifies HTS 7409.31.10.00 as classic copper-tin bronze with minimal zinc <10%.