Knowledge What are Low Temperature Brazing Alloys? (5 Key Points Explained)
Author avatar

Tech Team · Kintek Solution

Updated 1 month ago

What are Low Temperature Brazing Alloys? (5 Key Points Explained)

Low temperature brazing alloys are specialized materials used to join metals at temperatures significantly lower than the melting point of the metals being joined.

These alloys are crucial for maintaining the integrity and properties of the base materials.

They are especially important in applications involving temperature-sensitive materials or complex assemblies where high temperatures could cause damage or distortion.

5 Key Points Explained

What are Low Temperature Brazing Alloys? (5 Key Points Explained)

1. Composition and Types of Low Temperature Brazing Alloys

Low temperature brazing alloys are typically based on the Al-Si system.

Silicon content generally ranges from 7% to 12%.

The Al-Si system with 11.7% silicon is a eutectic system, which means it has a lower melting point than either of its constituent elements.

This eutectic composition melts at 577°C and is commonly used for brazing various aluminum alloys.

The addition of elements like magnesium can further modify these alloys to enhance their brazing properties.

2. Applications and Methods

These alloys are used in several brazing methods, including vacuum brazing, brazing in air with flux, and brazing under a reducing atmosphere.

Vacuum brazing is particularly effective for aluminum alloys as it prevents oxidation and ensures a strong, clean joint.

For stainless steels, low-temperature silver brazing alloys are often used, which typically have melting ranges around 600-710°C.

3. Considerations for Use

When using low temperature brazing alloys, it is important to maintain the lowest possible brazing temperature within the recommended range to prevent damage to the base materials.

The brazing temperature should be at least 25°C above the liquidus temperature of the braze alloy.

The time spent at the brazing temperature should be sufficient to ensure uniform heating across all parts of the assembly, typically ranging from 5 to 10 minutes.

After brazing, the assembly should be cooled to a temperature below the solidus of the braze alloy before any quenching to prevent the molten alloy from being displaced from the joint.

4. Challenges and Precautions

Certain alloys, particularly those that are precipitation-hardened like some in the 2xxx (Al-Cu) and 7xxx (Al-Zn-Mg) series, cannot be brazed using low temperature methods due to their low melting points.

Precautions must be taken with other alloys, such as those in the 6xxx series (Al-Si-Mg), due to the low solidus temperatures, which can affect the brazing process and the integrity of the joint.

5. Summary

In summary, low temperature brazing alloys are essential for joining metals without causing thermal damage.

Their selection and use must be carefully managed to ensure the best results in terms of joint strength and material integrity.

Continue exploring, consult our experts

Discover the precision and reliability of KINTEK SOLUTION’s premium low temperature brazing alloys.

Meticulously crafted to join metals at remarkable temperatures while preserving the integrity of base materials.

With our diverse range of Al-Si systems and expert modifications, we offer unparalleled brazing solutions for delicate applications and complex assemblies.

Trust KINTEK SOLUTION to deliver top-tier performance, ensuring strong, clean joints and preventing thermal damage—your success is our mission!

Related Products

Vacuum brazing furnace

Vacuum brazing furnace

A vacuum brazing furnace is a type of industrial furnace used for brazing, a metalworking process that joins two pieces of metal using a filler metal that melts at a lower temperature than the base metals. Vacuum brazing furnaces are typically used for high-quality applications where a strong, clean joint is required.

Alkali-free / Boro-aluminosilicate glass

Alkali-free / Boro-aluminosilicate glass

Boroaluminosilicate glass is highly resistant to thermal expansion, making it suitable for applications that require resistance to temperature changes, such as laboratory glassware and cooking utensils.

Small vacuum tungsten wire sintering furnace

Small vacuum tungsten wire sintering furnace

The small vacuum tungsten wire sintering furnace is a compact experimental vacuum furnace specially designed for universities and scientific research institutes. The furnace features a CNC welded shell and vacuum piping to ensure leak-free operation. Quick-connect electrical connections facilitate relocation and debugging, and the standard electrical control cabinet is safe and convenient to operate.

Boron Nitride (BN) Ceramic Plate

Boron Nitride (BN) Ceramic Plate

Boron nitride (BN) ceramic plates do not use aluminum water to wet, and can provide comprehensive protection for the surface of materials that directly contact molten aluminum, magnesium, zinc alloys and their slag.

Vacuum tube hot press furnace

Vacuum tube hot press furnace

Reduce forming pressure & shorten sintering time with Vacuum Tube Hot Press Furnace for high-density, fine-grain materials. Ideal for refractory metals.

Non consumable vacuum arc furnace Induction melting furnace

Non consumable vacuum arc furnace Induction melting furnace

Explore the benefits of Non-Consumable Vacuum Arc Furnace with high melting point electrodes. Small, easy to operate & eco-friendly. Ideal for laboratory research on refractory metals & carbides.

Vacuum Induction Melting Spinning System Arc Melting Furnace

Vacuum Induction Melting Spinning System Arc Melting Furnace

Develop metastable materials with ease using our Vacuum Melt Spinning System. Ideal for research and experimental work with amorphous and microcrystalline materials. Order now for effective results.

Boron Nitride (BN) Ceramic Custom Parts

Boron Nitride (BN) Ceramic Custom Parts

Boron nitride (BN) ceramics can have different shapes, so they can be manufactured to generate high temperature, high pressure, insulation and heat dissipation to avoid neutron radiation.

Boron Nitride (BN) Ceramics-Conductive Composite

Boron Nitride (BN) Ceramics-Conductive Composite

Due to the characteristics of boron nitride itself, the dielectric constant and dielectric loss are very small, so it is an ideal electrical insulating material.

Alumina (Al2O3) Plate-High Temperature and Wear-Resistant Insulating

Alumina (Al2O3) Plate-High Temperature and Wear-Resistant Insulating

High temperature wear-resistant insulating alumina plate has excellent insulation performance and high temperature resistance.

Vacuum molybdenum wire sintering furnace

Vacuum molybdenum wire sintering furnace

A vacuum molybdenum wire sintering furnace is a vertical or bedroom structure, which is suitable for withdrawal, brazing, sintering and degassing of metal materials under high vacuum and high temperature conditions. It is also suitable for dehydroxylation treatment of quartz materials.

Titanium Silicon Alloy (TiSi) Sputtering Target / Powder / Wire / Block / Granule

Titanium Silicon Alloy (TiSi) Sputtering Target / Powder / Wire / Block / Granule

Discover our affordable Titanium Silicon Alloy (TiSi) materials for laboratory use. Our custom production offers various purities, shapes, and sizes for sputtering targets, coatings, powders, and more. Find the perfect match for your unique needs.

Aluminum Silicon Yttrium alloy (AlSiY) Sputtering Target / Powder / Wire / Block / Granule

Aluminum Silicon Yttrium alloy (AlSiY) Sputtering Target / Powder / Wire / Block / Granule

Find high-quality AlSiY materials tailored to your lab's unique needs. Our affordable range includes sputtering targets, powders, wire rods, and more in various sizes and shapes. Order now!

Tin Bismuth Silver Alloy (SnBiAg) Sputtering Target / Powder / Wire / Block / Granule

Tin Bismuth Silver Alloy (SnBiAg) Sputtering Target / Powder / Wire / Block / Granule

Discover our high-quality Tin Bismuth Silver Alloy materials at reasonable prices. We offer a wide range of customized shapes and sizes for your laboratory needs. Shop sputtering targets, coatings, powders, and more today.

Vacuum induction melting furnace Arc Melting Furnace

Vacuum induction melting furnace Arc Melting Furnace

Get precise alloy composition with our Vacuum Induction Melting Furnace. Ideal for aerospace, nuclear energy, and electronic industries. Order now for effective smelting and casting of metals and alloys.

Alumina Zirconia Special-Shaped Parts Processing Custom-Made Ceramic Plates

Alumina Zirconia Special-Shaped Parts Processing Custom-Made Ceramic Plates

Alumina ceramics have good electrical conductivity, mechanical strength and high temperature resistance, while zirconia ceramics are known for their high strength and high toughness and are widely used.

Vacuum hot press furnace

Vacuum hot press furnace

Discover the advantages of Vacuum Hot Press Furnace! Manufacture dense refractory metals & compounds, ceramics, and composites under high temp and pressure.

Vacuum arc furnace Induction melting furnace

Vacuum arc furnace Induction melting furnace

Discover the power of Vacuum Arc Furnace for melting active & refractory metals. High-speed, remarkable degassing effect, and free of contamination. Learn more now!


Leave Your Message