Fluxed-Core Arc-Welding (FCAW) uses a tubular electrode filled with flux that
is much less brittle than the coatings on SMAW electrodes while preserving most
of its potential alloying benefits.
The emissive fluxes used shield the weld arc from surrounding air, or shielding gases are used and nonemissive fluxes are employed. The higher weld-metal deposition rate of FCAW over GMAW (Gas Metal Arc Welding) has led to its popularity in joining relatively heavy sections of 1" or thicker.
Another major advantage of FCAW is the ease with which specific weld-metal alloy chemistries can be developed. The process is also easily automated, especially with the new robotic systems.
