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HSChapter 74
U.S. imports of unwrought copper-tin alloys (bronze) (HS 740322) totaled $763K in April 2026, traded with 18 countries.
Importers of Unwrought Copper-Tin Alloys (Bronze) paid $23K in duties in April 2026 — an effective duty rate of 3.5% on $657K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataBronze — copper alloyed principally with tin — is a primary input for bearings, bushings, marine hardware, sculpture casting, and industrial wear components, where its combination of strength, corrosion resistance, and low friction is valued. Spain leads US import supply, followed by Canada and India. Classified under the single line 7403220000, unwrought bronze must be distinguished from phosphor bronze, aluminum bronze, and other copper alloys that may carry tin but are classified as copper alloys NESOI (740329) if another element predominates or defines the alloy family.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Classification depends on which element, after copper, gives the alloy its defining character. A copper-tin alloy with a small phosphorus addition for deoxidation is still classified as bronze under 7403220000 if tin is the primary alloying element. However, if another element such as aluminum or nickel predominates or defines the alloy's commercial identity, the material may fall under the NESOI copper alloys heading 740329. Alloy composition certificates and the producer's commercial designation are key supporting documents.
Primary demand comes from bearing and bushing manufacturers, marine equipment producers, and art foundries. Industrial bearing demand tends to track capital equipment and infrastructure investment cycles rather than seasonality, while art and architectural bronze demand is project-driven. Importers supplying foundries should anticipate lead-time variability tied to project schedules rather than predictable seasonal peaks.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7403220000 | UNWROUGHT COPPER-TIN BASED ALLOYS (BRONZE) | $763K | 3.50% | $23K |
UNWROUGHT COPPER-TIN BASED ALLOYS (BRONZE)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7403220000 | UNWROUGHT COPPER-TIN BASED ALLOYS (BRONZE) | $1.5M |
UNWROUGHT COPPER-TIN BASED ALLOYS (BRONZE)
278.0K kg
REFINED COPPER CATHODES AND SECTIONS OF CATHODES
HS 740311
COPPER WASTE AND SCRAP
HS 740400
TUBES & PIPES OF REFINED COPPER
HS 741110
COPPER ALLOY TUBE OR PIPE FITTINGS
HS 741220
COPPER FOIL, NOT BACKED, OF REFINED COPPER
HS 741011
BARS, RODS AND PROFILES OF REFINED COPPER
HS 740710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Ohio | $67K | $662K | +$594K |
| New Jersey | $301K | -- | -$301K |
| Indiana | -- | $272K | +$272K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| BUFFALO-NIAGARA FALLS, NY | $64K | $474K | +$411K |
| LAREDO, TX | -- | $476K | +$476K |
| DETROIT, MI | $35K | $141K | +$106K |