When Should I Use Brazing Vs Welding On A Project?

Have you ever wondered what the difference between brazing and welding is? If you know how to weld, you should also learn how to braze, because this will come in handy at some point or another.

Brazing

Source: The Fabricator

Whenever you have to join together metal parts that are particularly strong, you’re either going to have to go with brazing or with welding.

Still, these two techniques are not the same, and the former is most likely not one of the welding alternatives you’re familiar. There’s more than one difference between the two. We’re going to explore each of them in today’s guide.

Let’s look at brazing vs welding and see when you have to use which!

 

Brazing Vs Welding: The Main Differences

Metal Thickness

The first thing that differentiates these two techniques is the fact that you use them on metals of a different thickness. In the case of metals thicker than 0.5 inches, you can use both techniques. On thinner metals, you should go with a braze joint instead of welding. That’s because welding uses a higher temperature, which could burn through metal that is not thick enough.

Brazing Aluminum and Brazing Steel: Material Types

Naturally, the type of material is another factor to keep in mind when considering what technique to use. Remember that whenever you have two different materials that you want to join, you should use a brazed joint. That’s because that way, you won’t won’t alter their base-metal properties as much as welding. Just make sure that the filler material you use is compatible with both metals you’re trying to fuse, and also melts faster than them. If you were to attempt to weld steel and copper, the high temperature won’t allow you to do so, while brazing steel and copper is no problem.

How to Braze – Joint Configuration

If you have to fuse spot joints, you can use both welding and brazing, although we recommend welding. The reason why we suggest welding is because it’s a localized technique, which means that if you want to connect the pieces in only one point, welding them is both easy and economical, guaranteeing durable results. In the case of linear joints, brazing would be more suitable, because you don’t have to manually trace the joint line, but simply fill in the joint configurations with the filler metal. Welding linear joints would imply heating one of the ends until it melts, and then manually moving along the joint line.

Size

The size of the assembly is also important when making a decision. In the case of larger assemblies, welding is the best solution. Save brazing for smaller project, since this technique reaches broad areas that tend to lose heat quite fast. Losing heat means you’ll have a hard time reaching the filling metal’s flow point.

Appearance

Finally, the last issue that should concern you whenever you’re trying to decide between welding and brazing is how you want the materials to look. If you’re keen on a nice appearance, we advise you to choose brazing, since this will leave a neat bead, as opposed to an irregular one, like welding would.

We hope today’s short guide to brazing vs welding has helped you understand the differences between the two and when you should use which.

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