GMAW Applications

“GMAW Applications” 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 go into GMAW. A good understanding of these concepts helps prevent welders from producing irregular or defective welds.

Course Objectives:

  • Describe GMAW
  • Describe common methods of preparing a joint for GMAW
  • Describe how to select the correct electrode for a GMAW application
  • Contrast work and travel angles
  • Distinguish between push and drag angles
  • Contrast work angles and travel angles
  • Describe travel speed
  • Describe how to run common GMAW beads
  • Describe amperage and wire feed speed in GMAW
  • Describe current density in GMAW
  • Describe voltage in GMAW
  • Describe electrode extension and CTWD
  • Describe shielding gas in GMAW
  • Explain the relationships between shielding gases and modes of metal transfer
  • Distinguish between discontinuities and defects
  • Describe porosity
  • Describe undercut
  • Describe incomplete penetration
  • Describe incomplete fusion.

Recommended Background

  • Recommended for manufacturing personnel, including engineers, technicians and managers, particularly handling welding operations.
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Course ID


Skill Focus

Smart Business



Employee Type

New Applicants, Operations team, 1st level supervisor

Method of Delivery


Estimated Effort

3.5 hrs



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