Engineering Manufacture OCR R109 Practice Test

Joining with melting solder means using a filler metal that has a much lower melting point than the parts being joined. The solder melts and flows into the joint, aided by flux, and when it cools it bonds the pieces together. The base metals stay solid throughout the process, so this method is great for electrical connections and light metalwork where high strength isn’t required and temperatures must remain low.

This approach differs from brazing, which also uses a separate filler metal but at higher temperatures, still keeping the base metals solid. It’s distinct from welding, which actually melts the base metals to fuse them together. And it’s different from riveting, which joins parts by mechanical fasteners rather than melting or flowing filler metal.