Code 3810 90 · Heading 3810

Preparations for filling or coating welding electrodes or wire, and soldering or welding fluxes and other aids — excluding metal powders or pastes and flux-filled base-metal electrodes

This covers preparations used to fill or coat welding electrodes or welding wire, as well as fluxes and other aids for soldering or welding. It does not cover powders or pastes made of metal and other substances, or base-metal or metal-carbide electrodes coated or filled with flux.

For example

Preparation for filling welding electrodes
Preparation for coating welding wire
Soldering flux
Welding flux

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See the official tariff text

Official tariff text

Fluxes and other auxiliary preparations for soldering, brazing or welding; preparations of a kind used as cores or coatings for welding electrodes or rods (excl. soldering, brazing or welding powders and pastes consisting of metal and other materials, and welding electrodes or rods of base metals or metal carbides coated with fluxes)

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section VI Products of the chemical or allied industries
Is it an inorganic or organic chemical; a pharmaceutical product; a fertilizer; a tanning or dye extract, pigment, paint, varnish, filler or printing ink; an essential oil, perfume, cosmetic or toilet product; soap, a surface-active, washing, cleaning, polishing or wax product; a protein, modified starch, glue or enzyme; an explosive, pyrotechnic article, match or other specified combustible material; a photographic or cinematographic product; or another chemical product?
✓
Step 2 · Chapter 38 Miscellaneous chemical products 11 of 11 chapters in section VI
Which specific product type is it: a carbon or mineral product, resin or terpentine product, pesticide, textile, paper or leather treatment, soldering or welding preparation, oil or fuel additive, rubber or plastic additive, fire-extinguishing preparation, solvent or paint remover, catalyst, refractory product, alkylbenzene or alkylnaphthalene mixture, doped electronic material, hydraulic fluid, antifreeze or de-icing liquid, culture substrate, diagnostic or laboratory reagent, fatty acid or fatty alcohol, foundry binder or other chemical preparation, chemical waste, biodiesel, or a mixture containing halogenated methane, ethane or propane derivatives?
✓
Step 3 · Heading 3810 Pickling preparations for metal surfaces; fluxes an… 10 of 27 headings under chapter 38
Is it a metal pickling preparation, or soldering or welding powder or paste consisting of metal and other substances; or is it a preparation for filling or coating welding electrodes or wire, or a flux or other aid for soldering or welding?
✓
Step 4 · Subheading 3810 90 Fluxes and other auxiliary preparations for solderi… 2 of 2 subheadings under heading 3810
Is it a preparation used to fill or coat welding electrodes or welding wire?

Full 8-digit codes

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Classification decides the rate here: from 4.1% to 6.5%.

3810 10 Pickling preparations for metal surfaces; soldering, brazing or welding pastes and powders consisting of metal and other materials 6.5%
3810 90 Fluxes and other auxiliary preparations for soldering, brazing or welding; preparations of a kind used as cores or coatings for welding electrodes or rods (excl. soldering, brazing or welding powders and pastes consisting of metal and other materials, and welding electrodes or rods of base metals or metal carbides coated with fluxes) you are here 4.1–5.0%

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

38.10.9000

Other

Ordinary duty

Duty free

Goods of EU origin

Duty free You need documentation of EU origin to use this rate.

Norwegian tariff data version 1.5/1.2, last checked Aug. 9, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

All 2 UK lines under this code

They all have the same duty rates shown here.

Ordinary duty

Duty free

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1576, last checked Aug. 9, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

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Pickling preparations for metal surfaces; soldering, brazing or weldi…

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Fluxes and other auxiliary preparations for soldering, brazing or wel…

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with SKAT, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.