Braze Paste with Flux for Copper from Japan
Pre-mixed paste containing copper phosphorus brazing alloy and borax flux for refrigeration tubing. Classified under HTS 3810.90.5000 as auxiliary brazing preparation, though borderline with complete pastes. Provides self-fluxing action up to 1500°F.
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%
Import Tips
• Alloy vs pure flux ratio determines 3810.90 vs 8312 classification
• Melting range documentation (1100-1500°F) confirms brazing process
• Phosphorus content <0.05% avoids self-fluxing brazing rod category