Product classification
HS code for Soldering wire: 8311.30
Rods and wire, coated rods and cored wire, of base metal, for soldering, brazing or welding by flame.
Classification of soldering wire under HS 8311.30
Soldering wire is classified under HS code 8311.30 because it consists of base metal wire that is cored or coated with flux material for use in soldering or brazing by flame. Chapter 83 covers miscellaneous articles of base metal, and heading 8311 is specifically dedicated to wire, rods, tubes, plates, and electrodes of base metal or of metal carbides, which are coated or cored with flux material. The classification 8311.30 specifically targets products used for soldering, brazing, or welding by flame. The defining characteristic for this code is the presence of a flux core (such as rosin or acid) or a flux coating. This flux is essential for the soldering process as it cleans the metal surfaces and prevents oxidation during heating. Without this flux component, the wire would be classified based on its constituent metal (e.g., tin or lead) in their respective chapters. The inclusion of the flux makes it a specialized article for joining metals, thus placing it under the specific provisions of heading 8311.
- Covers
- Rosin-core solder wire
- Acid-core solder wire for plumbing
- Flux-cored silver solder wire
- Aluminum soldering wire with internal flux
- Lead-free flux-cored soldering wire
- Also under 8311.30
- Harris Stay-Silv brazing alloys
- Lucas-Milhaupt brazing alloys
- Kester Solder
- Alpha Assembly Solutions solder
- Worthington Industries brazing rods
Codes often confused with 8311.30
Common mistake. Soldering wire is frequently misclassified under 8003.00 (Tin bars, rods, and wire). The distinction lies in the flux; 8003.00 is for solid tin wire without any flux core. Another common error is using 8311.10, which is reserved for coated electrodes for electric arc-welding. Since soldering wire is typically used with a soldering iron or flame rather than an electric arc, 8311.30 is the correct designation.
Top exporters and importers of HS 831130 (the code used for soldering wire), 2025
In 2025, the largest exporter of HS 831130 (the code used for soldering wire) in UN Comtrade data was China, with 38% of world exports; the largest importer in UN Comtrade data was the United States, with 18% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 831130, not only soldering wire.
Top exporters 2025 · share of world exports
- 1 China $234M 38% of world exports
- 2 Thailand $88M 14% of world exports
- 3 United States $42M 6.8% of world exports
World total: $618M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $100M 18% of world imports
- 2 Vietnam* ~$55M 9.9% of world imports · partner records ↗
- 3 China $40M 7.2% of world imports
World total: $554M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for soldering wire
Brazil classifies soldering wire under NCM 8311.30.00: HS 8311.30 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about soldering wire
What is the HS code for Soldering wire?
The HS code for Soldering wire is 831130 (Rods and wire; coated rods and cored wire, of base metal, for soldering, brazing or welding by flame). The HS code for flux-cored or coated soldering wire of base metal is 8311.30.
How do I classify Soldering wire for customs?
Soldering wire is classified under HS code 831130 — Rods and wire; coated rods and cored wire, of base metal, for soldering, brazing or welding by flame. This is a 6-digit subheading level code.
Does this code apply to solid wire without flux?
No, solid wire without a flux core or coating is classified by its metal composition, such as 8003.00 for tin or 7408.19 for copper.
Which countries are the top exporters of soldering wire (HS 831130)?
In 2025, the top exporters of HS 831130 (the code used for soldering wire) in UN Comtrade data were China ($234M, 38% of world exports), Thailand ($88M) and the United States ($42M). World exports came to about $618M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of soldering wire (HS 831130)?
In 2025, the top importers of HS 831130 (the code used for soldering wire) in UN Comtrade data were the United States ($100M, 18% of world imports), Vietnam (about $55M) and China ($40M). World imports came to about $554M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Soldering wire the same in all countries?
The base HS code 831130 for Soldering wire is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for soldering wire in Brazil?
In Brazil, soldering wire (HS 831130) is classified under NCM 8311.30.00.