U.S. exports of Unwrought Copper Alloys (NESOI) (HS 740329) totaled $10.2M in August 2026.
Importers of Unwrought Copper Alloys (NESOI) paid $29K in duties in August 2026, an average duty rate of 3.18% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Unwrought Copper Alloys (NESOI) imports of $907K in August 2026 ran 44% below the year-to-date monthly average of $1.6M.
Last updated: August 2026 dataNickel silver (copper-nickel-zinc) and cupro-nickel alloys occupy a dedicated line (7403290110) within this residual heading, reflecting their distinct commercial roles in coinage, marine heat exchangers, and decorative applications — while all other unwrought copper alloys not elsewhere specified fall under 7403290180. New Zealand and Switzerland lead US import supply, a sourcing pattern that reflects specialty alloy production rather than commodity copper flows. Importers should pay close attention to alloy composition documentation, as the boundary between this heading and the named alloy subheadings (brass at 740321, bronze at 740322) turns on which non-copper element is primary.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
33 import shipments a month
Both nickel silver (copper-nickel-zinc, sometimes called German silver) and cupro-nickel (copper-nickel binary or near-binary alloys) are grouped together under 7403290110 in the US tariff schedule. Despite their different compositions and end uses — nickel silver is used in cutlery, musical instruments, and decorative hardware, while cupro-nickel is used in coinage and marine condensers — they share the same 10-digit line. The alloy type should still be specified on commercial documentation for downstream traceability.
CBP may issue a CF-28 or CF-29 request if the alloy's composition is not clearly documented and there is ambiguity about whether it belongs in a named subheading (brass, bronze, nickel silver/cupro-nickel) versus the residual basket. Providing a certified mill analysis showing the percentage of each alloying element, along with the producer's commercial alloy designation, is typically sufficient to resolve the classification question.
Subheading 3 of 7 in heading 7403
Subheading 740329 · $10.2M of $184.1M
Trade Directory
List your company under HS 740329 — Unwrought Copper Alloys (NESOI), so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7403290180 | Unwrought Copper Alloys, NESOI | $854K | 3.37% | 93.47% | $29K |
| 7403290110 | Unwrought Nickel Silver A Cupro-Nickel Base Alloys | $52K | 0.21% | 21.16% | $111 |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7403290180 | Unwrought Copper Alloys, NESOI | $8.2M |
| 7403290110 | Unwrought Nickel Silver A Cupro-Nickel Base Alloys | $2.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$907KYoY · free account
Exports
$10.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $20.0M of Unwrought Copper Alloys (NESOI) and exported $54.1M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Germany and Japan together take 74% of it.
customs district
entry
rate provision · imports
10.7% enters free of duty; duty collected equals 3.18% of imports for consumption.