Advantages and Disadvantages

 

SMAW- Shielded Metal Arc Welding
Advantages

  1. Lower equipment cost than GTAW, FCAW and GMAW. (No bottle, gas hose, flowmeter, and tig rig/Wire feeder  needed.
  2. Quick Change from one material to another.
  3. The process lends itself to welding in confined spaces and various positions with few problems.
  4. Deposition Rates faster than GTAW Manual
  5. Easy to move from one location to another. No Wire Feeder and Bottle.
  6. Some special electrodes are made for cutting/gouging
  7. Requires no outside shielding gas and can be used outdoors in light to medium wind.
  8. The ability to bend the electrode and the small space the electrode takes allows the process to be used in comparitively tight spaces. However keep in mind that for some jobs one of the other processes may also work or even work better. The FCAW-Self Shielded process can weld with a very long electrode stickout.

Disadvantages

  1. Low deposition rate compared to GMAW/FCAW.
  2. Filler metal cost per weld can be greater due to a low deposition efficiency that can vary greatly with stub length.
  3. Production factor is typically lower (Unless welding on various materials) due to rod changes and chipping slag.
  4. Needs more hand eye coordination than GMAW/FCAW.
  5. Slag must be removed as compared to GTAW/GMAW