Brazing is a heat treating process in which melted metallic filler is used to bond two base pieces creating an extremely strong and often hermetic joint. Unlike many heat treatments, brazing does not alter the internal structure of materials in order to effect change. Instead, brazing uses a technique similar to welding and soldering in order to create strong and lasting joints between two components.
This particular heat treating process involves heating two adjacent metal parts to just below their melting points. The brazing material, or filler is then melted along the heated seam between components. This filler blocks in the entirety of the gap and creates a strong seal when cooled. Industries such as aerospace, agriculture, semiconductor manufacturing, plumbing and others rely on the use of brazing to join panels, pipes, tubes, rods or any additional components which are not, but should be adjoined. Metals such as copper, bronze, steel, aluminum, iron and stainless steel can be joined to similar elements or to any other metal without the distortion, deformation or chemical amalgamation encountered by other heat treatments. Ceramics and other non-metal materials can be joined via brazing with specialized materials and attention, though this is far less frequent. No matter the materials, safety precautions are essential to workplace and employee safety in facilities where brazing is performed. Tinted goggles and heat resistant gloves are most commonly used, though a welding mask and full suit may also be required in some applications.