Which of the following processes is NOT associated with the joining of metals?

The process of casting is primarily involved in the creation of metal parts by pouring molten metal into a mold, where it solidifies to form a desired shape. This process focuses on fabricating individual components rather than joining two or more existing metal pieces together.

In contrast, welding, soldering, and brazing are all processes specifically designed for joining metals. Welding uses heat to melt and fuse surfaces together, while soldering involves a filler material that melts at a lower temperature to join metal parts. Brazing, similar to soldering, employs a filler metal but operates at higher temperatures and can join larger components more effectively.

Understanding these distinctions is crucial in manufacturing and metalworking, as each method serves specific purposes and applications within the industry.