Copper Phosphorus Brazing Paste

Self-fluxing copper-phosphorus brazing paste for copper-nickel heat exchanger tubes. Contains 7% phosphorus for fluxing action during 700-850°C brazing. HTS 3810.10.00.00 as brazing paste of metal with auxiliary materials.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China5%+35.0%40%
🇲🇽Mexico5%+10.0%15%
🇨🇦Canada5%+10.0%15%
🇩🇪Germany5%+10.0%15%
🇯🇵Japan5%+10.0%15%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

7406Lower: 10% vs 40%

If copper master alloys without paste formulation

Copper-phosphorus alloys as bars/wire in Chapter 74; pastes in 3810.

3810.90Lower: 15% vs 40%

If non-self-fluxing preparations

Preparations requiring separate flux classified differently.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Import Tips & Compliance

Phosphorus percentage certification prevents copper-only metal classification

Brazing procedure specifications prove auxiliary preparation status

Temperature-controlled shipping maintains paste homogeneity

Related Products under HTS 3810.10.00.00

Hydrochloric Acid Metal Pickling Solution

A concentrated hydrochloric acid-based solution used to remove rust and scale from steel surfaces prior to painting or galvanizing. It falls under HTS 3810.10.00.00 as a pickling preparation specifically formulated for metal surfaces, dissolving metal oxides without attacking the base metal excessively. Typically sold in industrial drums for manufacturing applications.

Phosphoric Acid Metal Descaling Paste

Thick paste containing phosphoric acid for descaling and derusting aluminum and stainless steel surfaces in aerospace and automotive repair. Classified under 3810.10.00.00 due to its role as a pickling preparation that removes oxide layers from metal via chemical reaction. Applied by brush and rinsed off after treatment.

Sulfuric Acid Steel Pickling Bath Inhibited

Inhibited sulfuric acid solution for continuous steel pickling lines in pipe and sheet manufacturing, preventing excessive base metal attack. Meets HTS 3810.10.00.00 criteria as a specialized pickling preparation for ferrous metals. Includes organic inhibitors for controlled corrosion.

Silver Solder Paste 56% Ag Flux Core

Pre-mixed silver solder paste with 56% silver content and integrated flux for HVAC and refrigeration brazing applications. Falls under HTS 3810.10.00.00 as a soldering paste consisting of metal alloys and flux materials. Provides strong, leak-proof joints on copper tubing.

Mild Steel MIG Welding Powder Flux

Granular flux powder for gasless MIG welding of mild steel, containing metal powders and deoxidizers. Classified in 3810.10.00.00 as a welding powder consisting of metal and auxiliary materials for arc stability. Used in structural fabrication and automotive repair.

Aluminum Brazing Flux Paste

Chloride-free flux paste for torch brazing aluminum heat exchangers in automotive radiators. HTS 3810.10.00.00 classification applies to auxiliary preparations containing fluorides for aluminum oxide removal during brazing. Remains active up to 600°C.