What is the difference between brazing and welding?

Did you know? Welding is commonly used to join metal parts. The term "welding" is used to define the process, and "weld" refers to the product or result of the welding process. Similarly, the process is called brazing, and the result is called soldering.

There are several types of brazing: soft soldering and brazing. Brazing requires melting temperatures ranging from 600°C to 1000°C, while in soft soldering, the filler metal melts at less than 450°C.

In welding and brazing, the main objective is to achieve the best possible mechanical performance.

Especially for brazing, the molten filler metal must be in perfect contact with the base metal. It is distributed first by capillary action, promoted by heating the metal parts to be joined, and then by diffusion. Particular attention must therefore be paid to preparation work and surface finish.

Air Liquide, a world leader in industrial gases, has a deep understanding of the differences between welding and brazing. Our experts can advise you on the choice of gases, rods, and filler metals to achieve high-quality welding (TIG welding and other processes) or brazing (torch welding), while taking your needs into account.