Boric Acid Welding Flux Powder
A fine powder of boric acid and borates used as flux for oxyacetylene brazing of steel parts, with a wholly inorganic composition that prevents oxidation during high-heat joining. This product is an auxiliary preparation for brazing, falling under tariff item 3810.90.00 as 'Other' preparations.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is sold as pure boric acid rather than a flux preparation
2810.00.00 covers oxides of boron and boric acids as separate chemically defined compounds, while 3810.90.00 covers flux preparations.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Classify this flux as an auxiliary preparation for brazing under 3810.90.00
• Ensure the boric acid content is documented for customs and safety compliance
• Provide the product's intended use for oxyacetylene brazing
Related Products under Tariff item 3810.90.00
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Anti-Spatter Welding Spray
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