Skip To Content

Brazing Paste

Brazing Paste

Fusion, Inc. manufactures brazing and soldering automation equipment, including brazing paste. Our brazing paste products can be custom-blended to facilitate optimal metal joining for your specific brazing application. Learn more about the individual components of brazing paste, its applications, and the benefits of using our custom brazing paste formulations.

What Is Brazing Paste?

Brazing is a technique where non-ferrous braze alloys, or filler metals, are melted between two or more base metal parts to create a joint. The process involves heating the braze alloy above its melt temperature but below the base metals’ melting point. This allows capillary action to distribute the molten filler metal throughout the joint. As the braze alloy cools, it solidifies, forming a solid joint or seal.

Compared to traditional brazing materials, brazing paste is far better suited for automated applications, especially in high volumes. The brazing paste’s primary component is alloy powder, which can range anywhere from 40% to over 90% of the total paste weight. The brazing paste contains a flux agent that removes oxides from the base metals during heating, helping the brazing alloy flow smoothly and bond securely. The paste also contains a binder to hold the filler metal and flux in stable suspension.

Brazing Paste Components

Fusion, Inc.’s brazing pastes are designed to optimize your application or can be custom-manufactured to meet specific requirements. Our brazing paste consists of the following essential components:

  • Finely Atomized Filler Metal: This metal is alloyed to exact standards for composition, melting range, and compatibility with various base metals. Typical braze alloys include tin, cadmium-free silver, sil-phos, copper, phos-copper, aluminum, nickel, and jeweler’s gold. They are atomized into powder form and blended with flux into a paste composition. Most of our filler metals meet industry standards, guaranteeing consistent quality and performance. We can also customize filler metals with distinct properties so that they meet unique requirements.
  • Fluxing Agent: This component removes and prevents the reformation of surface oxides during brazing. The type of fluxing agent and amount used are matched to each application, ensuring optimal joint consistency while minimizing flux residue. This precise matching helps achieve cleaner, stronger joints and reduces the need for cleaning later.
  • Binder: The binder holds the filler metal and flux in a stable suspension, minimizing interaction between the two. This controlled binder formulation ensures a consistent application, keeping the brazing paste localized in the joint area.

Our brazing alloys are formulated to meet the specified service requirements for corrosion resistance and strength. They also adhere to standards set by the American Society for Testing Materials (ASTM), the American Welding Society (AWS), and the International Organization for Standardization (ISO).

Brazing Paste Applications

Brazing paste is versatile and highly compatible with a variety of base metals, including:

  • Brass
  • Copper
  • Stainless Steel
  • Carbon Steel
  • Aluminum
  • Nickel

Brazing paste also effectively joins mixed materials like silicon nitride or tungsten carbide to itself or to other metal parts.

Advantages of Brazing Paste

Using brazing paste offers several key advantages, especially in automated industrial processes:

  • Automation Capability: Brazing paste enables brazing processes to be automated, enhancing efficiency and consistency.
  • Controlled Dispensing: Automated dispensing of paste controls the amount of alloy used, improving precision and reducing waste.
  • Replacement of Multiple Braze Rings: A single paste can replace multiple braze rings or preforms, simplifying the process.
  • Optimized Joint Quality: Levels of flux can be controlled to optimize joint quality, resulting in more robust, reliable joints.
  • Reduced Handling: Automated dispensing minimizes manual handling of brazing consumables, enhancing operator safety and production efficiency.

These advantages make brazing paste a vital material for industries that require high precision and reliability in their joining processes.

Brazing Paste Products From Fusion, Inc.

Fusion, Inc. takes a process-oriented approach to automating brazing and soldering applications. This approach includes three key elements: alloy selection and paste formulation, application equipment, and automation. Fusion’s expertise in these areas guarantees that our brazing paste products meet the highest quality and performance standards for your industrial application.

To learn more about Fusion, Inc.’s brazing paste products and services, contact us or request a consultation today.

Ready to start your next Project?

Contact us