What Is a Flux Core Welder

Welders are of multiple types. And each has its way of working depending on the material type and other things that are acting upon. However today we shall exclusively talk about what is a flux core welder and how it works, unlike others. It’s interesting precisely who is interested in welding and its insights. So let’s start.

What is a Flux Core Welder?

Flux core welders are also pretty commonly known as arc welding or flux core arc welding (FCAW) mainly because of shield welding. Flux welder is a semi-automatic arc and it is pretty much similar to the MAG welding process. Flux core uses the wire-fed electrode with a continuous approach and the constant voltage welding power supply to weld the process. Mainly flux core welding needs no shielding gas which makes it a portable welding solution among the rest.

Flux core welding is much more productive because it has high deposition rates that ensure the best and most reliable welding results. Plus the appearance or the final result seems pretty smooth. Moreover, it has a high welding speed followed by the user’s portability approach. This is the reason why the construction niche leans on FCAW welding!

Flux core welder use

If you use the flux core welder for what it has been meant for, you will get worthy results. Many core points add to the flux core welder such as its best for outdoors no matter what is the weather condition. You don’t have to stop welding if it’s windy out there. If you talk about its ideal and often used, the Flux core welder is a preferred choice for surfacing and hard-facing since it shows accordance for alloys, plain carbon, stainless and duplex steels.

Flux Core Welder working

Flux core welding works in two types since it depends on the shielding method. The first type of FCAW leans on the external shielding gas whereas the other leans onto the flux core to ensure the protection of the welding area. For shield welding, it keeps the weld pool safe from oxidation and that is done using a high-pressure gas cylinder.

This is known as dual shielding. As far as the second working process is concerned, it never leans on any external shielding gas. However, it does rely on the flux core electrode. The electrode ensures a well-protected process and also creates the slag that covers and protects the molten metal in the weld.

Majorly flux welding is suitable to weld most carbon steel, stainless steel, cast iron, and hard facing/surfacing alloys. But when it comes to welding nonferrous metals, namely the aluminum flux arc welding process is not recommenced.


Without knowing each type of welder you cannot ace into the welding field. Before venturing into the welder process knowing the proper insight about it is something that comes as helpful. For FCAW this welding process is flexible and mainly suitable for most welding positions. Keeping its advantages and flipside you can certainly opt for it.