What is the process of joining metal pipes or fittings using a filler metal that melts at a lower temperature than the materials being joined called?

The process of joining metal pipes or fittings using a filler metal that melts at a lower temperature than the materials being joined is known as soldering. In soldering, a filler metal, usually made of lead, tin, or a combination of these, is heated and melted to bond the pieces together. The melting point of the solder is typically below 450 degrees Celsius (about 840 degrees Fahrenheit), which is lower than that of the metals being joined.

Soldering is commonly used in electronics and plumbing applications due to its ability to create strong electrical and mechanical connections without compromising the integrity of the base metals. It allows for a clean joint and is a more accessible technique for joining smaller components.

Other methods, such as welding and brazing, involve different processes and temperature requirements. Welding usually involves melting the base materials themselves along with a filler rod, resulting in a strong joint but at much higher temperatures. Brazing is similar to soldering but uses a filler metal that has a higher melting point than solder, typically above 450 degrees Celsius. Fusing typically refers to the process of melting and combining similar materials without the use of a filler material at all.

In summary, soldering specifically involves a filler metal with a low melting point,