Braze Paste with Flux for Copper from China
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 — China → United States
42.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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