Flux Paste for Aluminum Brazing
A chloride-based paste that cleans and protects aluminum surfaces during high-temperature brazing operations. Classified under HTS 3810.90.5000 as an auxiliary preparation for brazing, it prevents oxidation and ensures strong joints in HVAC components. This subheading captures specialized fluxes beyond basic soldering types.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily for soldering rather than brazing operations
Soldering-specific fluxes are separated in 3810.10, based on process temperature and metal type.
If imported as distilled or purity-grade salts without flux binders
Pure chemical salts used in fluxes classify under other inorganic compounds, not prepared fluxes.
If sold as complete brazing rod with integrated flux coating
Flux-coated electrodes/rods shift to Chapter 83 as welding/brazing consumables.
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Import Tips & Compliance
• Provide detailed composition analysis to distinguish from general soldering fluxes under 3810.10
• Comply with DOT hazardous shipping for corrosive pastes; use UN 3264 classification
• Test for post-braze residue corrosivity to avoid environmental discharge violations
Related Products under HTS 3810.90.50.00
Metal Pickling Solution for Steel
A hydrochloric acid-based solution designed to remove rust and scale from steel surfaces prior to further processing. It falls under HTS 3810.90.5000 as a pickling preparation specifically for metal surfaces, used in industrial metal cleaning applications. This category covers auxiliary preparations essential for metal preparation in manufacturing.
Welding Electrode Coating Powder
A powdered mixture of silicates, carbonates, and ferroalloys applied as coatings to welding electrodes for arc stability and slag formation. It qualifies for HTS 3810.90.5000 as preparations used as cores or coatings for welding electrodes or rods. Essential in shielded metal arc welding for structural steel fabrication.
Silver Solder Flux for Electronics
A rosin-activated liquid flux optimized for silver-based soldering in circuit board assembly. Falls under HTS 3810.90.5000 as other auxiliary preparations for soldering, providing clean joints without residue in precision electronics. Meets J-STD-004 standards for no-clean applications.
Phosphoric Acid Metal Pickler
A gel-formulation phosphoric acid pickler for rust conversion and surface preparation on ferrous metals. HTS 3810.90.5000 classification applies to this metal surface pickling preparation, ideal for on-site maintenance without fuming issues. Contains inhibitors for flash rust prevention.
TIG Welding Flux for Stainless Steel
Fluoride-based flux powder for Gas Tungsten Arc Welding (TIG) of stainless steel, enabling oxide-free welds. Covered by HTS 3810.90.5000 as auxiliary preparation for welding, specifically for high-alloy metals requiring clean root penetration. Used in food/pharma equipment fabrication.
Anti-Spatter Welding Spray
Silicone-free aerosol spray that prevents weld spatter adhesion to fixtures and torches. HTS 3810.90.5000 includes this as other auxiliary preparation for welding, improving productivity in MIG/TIG operations. Non-toxic formula safe for food industry welding.