What is one of the major differences between soldering and brazing?

The correct choice highlights a significant distinction between soldering and brazing concerning the amount of heat required for each process. Soldering typically involves lower temperatures, generally around 350°F to 800°F (175°C to 425°C), depending on the type of solder being used. This lower-temperature process is commonly used for joining materials that might be damaged by the heat involved in brazing.

In contrast, brazing requires higher temperatures, often exceeding 800°F (425°C) and reaching up to 1,700°F (927°C) or more. This higher temperature is essential because brazing uses a filler metal with a melting point above that of solder but lower than that of the base metals being joined. The necessity for higher heat in brazing allows for the creation of stronger joints, as the processes of thermal expansion and filler metal flow contribute to a more robust bond.

Understanding this difference in the heat requirements helps in selecting the appropriate joining method based on the materials involved and the desired strength of the joint.