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3810.90.10.00/Styrene-Enhanced Brass Brazing Flux/Japan

Styrene-Enhanced Brass Brazing Flux from Japan

Liquid flux for brazing brass fittings containing styrene derivatives (>5% aromatics) to improve wetting and capillary action. Classified under HTS 3810.90.10.00 for brazing auxiliaries.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• Test flux on specific brass alloys; comply with plumbing code certifications

• Pitfall: incorrect brazing vs soldering designation