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HS code reference

HS Code for Fluxes and other auxiliary preparations: 3810.90

Fluxes and other auxiliary preparations; for soldering, brazing or welding, or preparations used as cores or coatings for welding electrodes or rods

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3810.90

Use case

Pre-quote review

Next step

Calculate duty

Estimates are for planning only. Confirm final classification and rates with a licensed customs broker or the relevant customs authority.

Review Notes

Classification boundary

Review material, use, construction, and accessories

Quote workflow

Estimate first, then confirm with official tariff or broker

Is 3810.90 always the HS code for Fluxes and other auxiliary preparations?

Fluxes and other auxiliary preparations can be reviewed from 3810.90, but the final code depends on full product details, material, use, and destination tariff rules.

How do I estimate US import cost with this code?

Use the tariff calculator with origin, customs value, freight, and insurance to estimate landed cost.

Is this a binding classification opinion?

No. This page is for pre-quote planning and does not replace customs rulings, official tariff data, or licensed broker advice.

Related HS code pages

3810.10

Pickling preparations for metal surfaces

Pickling preparations for metal surfaces; soldering, brazing or welding powders and pastes consisting of metal and other materials

3801.10

Graphite

Graphite; artificial

3801.20

Graphite

Graphite; colloidal or semi-colloidal

3801.30

Carbonaceous pastes

Carbonaceous pastes; for electrodes and similar pastes for furnace linings