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Gas Metal Arc Welding (GMAW) Advantages/Limitations

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     There are many Advantages in using the GMAW welding process.  This is because of the ease of use when compared to SMAW and the process capabilities. 
  • The GMAW process is a Low-Hydrogen process that makes it good for welding on materials that are susceptible to hydrogen cracking.
  • There is very little slag produce so it's post weld cleaning is minimal. 
  • Being that the electrode is a continuous wire it allows for long welds without the need to stop.
  • GMAW can have high travel speeds and deposition rates if it is compared to Shielded Metal Arc Welding (Stick/SMAW), which can save money on down time.
  • This process can be used in every position which is an advantage over the SAW welding process.
  • It can be Automated for high production with repeatable parts.
  • It is an process that is sometimes considered to be easier to learn than other processes.
  • The Process is Capable of welding Dissimilar metals.

Like with anything there are limitations to a welding process.
  • The welding machine itself is more complex then the SMAW power supplies, which leads to an increase in equipment costs.
  • Due to the size of the GMAW Gun it makes it hard to reach into smaller areas.
  • Also there is a lot of heat that is radiated off the process that can cause discomfort.
  • The Shielding Gas can be blown away from the weld pool causing many issues.
  • the whip should not be coiled while welding is being performed, because of possible undesirable feeding issues.

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