Gas tungsten arc welding (GTAW), often colloquially referred to as a specific type of welding, and shielded metal arc welding (SMAW), commonly known as another form, are distinct processes each employing different mechanisms for joining metals. GTAW uses a non-consumable tungsten electrode to create an arc, while a separate filler metal may be added. SMAW utilizes a consumable electrode coated in flux, which shields the weld from atmospheric contamination. Combining these two technologies into a single unit offers versatility for various applications.
The ability to switch between these two processes provides flexibility for welders tackling diverse projects. This adaptability is valuable in situations requiring the precision of GTAW for some joints and the speed and simplicity of SMAW for others. The historical development of these individual techniques laid the groundwork for combined units, reflecting the ongoing evolution of welding technology to meet changing demands.
