Brazing is a metal-joining process that involves melting a filler metal to bond two or more base metals together. The filler metal has a lower melting point than the base metals, typically above 450°C (842°F). This technique is commonly used in various industries, including automotive and plumbing, due to its ability to create strong, durable joints. During brazing, the base metals are heated, and the filler metal is applied to the joint. The molten filler flows into the gap by capillary action, forming a solid bond as it cools. Unlike welding, brazing does not melt the base metals, allowing for a wider range of materials to be joined, such as copper, aluminum, and steel.