What type of welding uses a filler metal to join two pieces together?

The type of welding that utilizes a filler metal to join two pieces together involves processes such as MIG (Metal Inert Gas), TIG (Tungsten Inert Gas), and stick welding. Each of these methods relies on a filler material to create a strong bond between the base metals.

In MIG welding, a continuous feed of filler wire is used and melted by an electric arc, which allows it to fill any gaps between the two pieces being joined. Similarly, TIG welding involves a non-consumable tungsten electrode to produce the arc, while a separate filler rod is manually added to the weld pool to achieve the necessary joint characteristics. Stick welding, or shielded metal arc welding (SMAW), also requires a filler metal in the form of an electrode that melts to create the weld pool, providing both the arc and the necessary filler.

Each of these techniques is designed for specific applications and materials, making them versatile for different welding needs, especially when a filler metal is essential for achieving the desired joint strength and integrity.