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MIG Welding Essentials: Gas MIG Welding vs Gasless MIG Welding

MIG Welding Essentials: Gas MIG Welding vs Gasless MIG Welding
MIG Welding Essentials: Gas MIG Welding vs Gasless MIG Welding

Gasless MIG Welding Vs. Gas MIG Welding The Pros and Cons of Both Methods

MIG Welding Essentials: Gas vs. gasless

When setting up a MIG welding machine, it’s important to consider gas versus gasless options and how to select the right type of inert gas supply for a MIG welding project.
The MIG welding process uses a gas to shield the filler metal and weld pool from reacting to any elements present in the surrounding environment.
However, MIG welding can also be performed as a gasless process which uses flux core wire without the need of shielding gases. The Flux Cored Wire MIG process, formally known as Flux Cored Arc Welding – Self Shielded (FCAW-SS) uses a specially designed cored wire protecting the weld pool from oxidation during the arc welding process.

The differences between gas and gasless for MIG welding

The main differences between MIG welding with a gas or gasless setup is gas provides a more stable, better-quality weld that produces less fumes and spatter. For a nice, clean weld on finer materials, gas MIG welding is preferable. While weld spatters are generally greater with a gasless process, some modern gasless wire can produce as nice as weld bead as gas MIG welding.

However, if you need to weld something in a hard-to-reach location, that is outdoors, a gasless setup is more efficient cost-wise, lighter, and portable for use. If cosmetics are not an issue, gasless MIG welding is more convenient.

Choosing the right MIG welding gas

When shopping for gas, you will want to look for products that are marketed specifically as MIG welding gas. If you are going to use gas for MIG welding, you will want to choose the correct gas for the metal you are working with.
Depending on the type of metal you are welding, the two most common gases used for MIG welding are pure argon (Ar) and an argon and carbon dioxide (Ar/CO2) gas blend. The primary difference between the two is that argon is an inert gas, while carbon dioxide is semi-inert.
For mild steel, argon and carbon dioxide (Ar/CO2) gas is recommended for a deeper penetrating weld with less spatter.
While for MIG welding aluminum, you will want to use pure argon (Ar) gas for a shallower, but thicker weld, with less spatter.
Power Welds offers a wide variety of MIG welding machines, products, and supplies for streamlining MIG welding processes on a variety of applications across different industries.
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