When choosing between Gas Metal Arc Welding (GMAW) and Flux Cored Arc Welding (FCAW) you should consider what you are welding, where you are welding, and the surface finish requirements of the weld.

• FCAW uses a wire that contains materials in its core that, when burned by the heat of the arc, produces shielding gases and fluxing agents to help produce a sound weld without the need for external shielding gas.
• The shielding can endure a strong breeze.
• The arc is forceful but creates spatter.
• When finished, the weld is covered with slag that usually must be removed.
• The settings on the wire feeder and power source are more critical for this process.
• An improper technique can magnify poor results. You can use this type of welding primarily on mild steel in outdoor applications.

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