Similar to MIG welding is flux cored arc welding. The difference being the metal filler has a core of flux. This core creates a gas shield around the weld. FCAW is a heavy and powerful weld most often used in structural welding. For this reason, Flux cored arc welding often uses hard metals, including carbon steel, cast iron, stainless steel, and hard-facing alloys. Contrarily, it will not use nonferrous metals and metal alloys.
Thicker metals often require the flux cored arc welding method. Not recommended for anything over 20 gauge, it is excellent for use on thinker metals. One of the benefits of FCAW is its efficiency in reducing waste. Moreover, it is often a low-cost option for customers using thicker metals on large jobs such as structural steel components. However, this method requires cleanup for a nicely fashioned weld appearance. One negative side of FCAW welding is its inability to use it with many pure metals such as aluminum, copper, lead, nickel, tin, titanium, and zinc.