What is Induction Brazing?

Induction brazing is the process of joining two or more metals using induction heating. Induction heating utilizes the electromagnetic field to provide heat without contact or flame. Induction brazing is more localized, repeatable, and easier to automate compared to traditional torch brazing.

Induction brazing has been around for a long time but is only now coming into wider use due to advancements in induction heating power supplies.

Induction brazing operates on a principle similar to that of a transformer. In this process, the inductor functions as the primary winding, while the component being heated acts as a single-turn secondary winding. This efficient method ensures precise heat application, making it ideal for joining metals with minimal distortion and strong, reliable joints.

The main advantage of induction brazing is its precisely localized heat. The induction heating coil can be placed directly on the joint, providing a more consistent amount of heat than a torch. Another advantage is that induction brazing is more repeatable than traditional brazing. The induction brazing process has a predictable heat profile (essentially, the amount of heat provided over time), which is more consistent than traditional brazing and can be automated. It does not depend on operator’s skills as much as the torch brazing.

induction brazing of copper tubing and brass fitting_brazing brass_brazing brass to brass_induction heat treating

Induction brazing is a relatively new process, and it is not yet widely used. However, it is gaining popularity among manufacturers and is expected to continue to grow in the coming years.

Induction brazing can be used to join a wide variety of metals, including nickel, copper, cobalt, titanium, and steel. Some non-metals, such as ceramics, graphite, and glass can also be brazed using induction. It is a great way to join dissimilar metals and alloys, thanks to its localized heat and ability to join metals without melting them. Because induction brazing uses electromagnetic fields rather than flame, it can be used in many places where flame brazing is not possible or not safe.