We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is Brazing?

By S. Mithra
Updated May 17, 2024
Our promise to you
About Mechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At About Mechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Brazing is a process that joins two pieces of base metal when a melted metallic filler — the braze — flows across the joint and cools to form a solid bond. Similar to soldering, brazing creates an extremely strong joint, usually stronger than the base metal pieces themselves, without melting or deforming the components. Two different metals, or base metals such as silver and bronze, are perfect for brazing. This method can be used to make a bond that is invisible, is resilient in a wide range of temperatures and can withstand jolting and twisting motions.

Shapes

The process of brazing is the same as soldering, although the metals and temperatures differ. Pipes, rods, flat metals or any other shape of metals can be brazed, as long as the pieces fit neatly against each other without large gaps. Brazing can handle more unusual configurations with linear joints, whereas most welding is done for spot welds on simpler shapes.

Preparing the Metals

Before brazing can begin, the entire area to be joined must be cleaned, or the melted braze mixture will clump instead of flow, making an inconsistent joint. The surface is then washed, and melted flux is applied. Flux removes oxides, prevents more oxidation during brazing and smooths the surface so that braze flows evenly across the joint.

Torches

The torch for this process uses fuels such as acetylene and hydrogen to create an extremely high temperature, often between 800° and 2,000° Fahrenheit (between 430&deg and 1,100° Celsius). The temperature must be low enough that the base metals don't melt but high enough to melt the braze. Torches have sensitively controls to reach the proper temperature, depending on the associated melting points.

Applying the Braze

To complete the joint, the braze is applied. Braze, like solder, comes in a stick, disc or wire, depending on the user's preference or the shape of the joint. After the base metals near the joint have been heated with the torch, the braze is applied to the hot pieces so that the braze melts and flows around the joint. This means that it penetrates the joint, working into every crevice. If the process was performed correctly, the bond is very strong after it cools and solidifies.

Advantages

This process offers many advantages over spot welding or soldering. For instance, a brazed joint is smooth and complete, creating an airtight and watertight bond for piping that can be easily plated so the seam disappears. It also conducts electricity like the base alloys. Only brazing can join dissimilar metals that have different melting points, such as bronze, steel, aluminum, wrought iron and copper.

About Mechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
By anon124070 — On Nov 04, 2010

@walterstuart: it sounds like you should solder it with a big soldering bolt, flux and plumbers solder. or if you are careful, try using a small blowlamp. sounds like an interesting project.

By origami — On Jul 21, 2010

@walterstuart i am not entirely sure, but it sounds like soldering might be best for you. you just need a soldering iron, some soldering wire, and some practice.

By walterstuart — On Feb 12, 2009

I'm doing a little craft project, building a little tree with leaves..all to be welded together.

What is the best instrument to get for this. The little rods are .032 and 1/16. The leaves are brass, too, and are 36 gauge. I don't want to go to a lot of expense for this, with tanks of gas and all that.

Thank you very much,

Hal

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.