GMAW Applications 301

This class provides a comprehensive overview of how to perform gas metal arc welding (GMAW), important variables to consider, and how to prevent common defects. Before beginning GMAW, it is important to prepare by cleaning base metals and selecting an appropriate electrode. During GMAW, the welder controls electrode orientation and travel speed. Welders must also be aware of many variables, such as amperage, voltage, and shielding gas, and their effects. Understanding these variables helps prevent weld discontinuities and defects, including porosity, undercut, incomplete penetration, and incomplete fusion. The information in this class prepares users to perform GMAW, an extremely common welding process. After taking this class, users will be familiar with many of the considerations and variables that affect GMAW. Understanding these concepts helps prevent welders from producing irregular or defective welds.