During metal insert gas (MIG) welding, a metal electrode wire is fed through the welding gun, alongside a shielding gas, so that the base materials can be joined without contaminating the weld pool. Also called gas metal arc welding (GMAW), MIG welding can fabricate materials that are up to ½ inch thick, meaning it has all kinds of applications. 

4 FAQ About MIG Welding

What kind of metal can the MIG system weld?

It produces the best results when used on mild steel; however, it can also be applied to other common metals, including aluminum, magnesium, and stainless steel. As long as the materials are between 24-gauge and ½ inch thick, MIG will get the job done. 

What kind of gas does it require?

When working with carbon steel, a gas comprised of 75% argon and 25% carbon dioxide, also known as C25, will produce the least amount of splatter. What’s more, this all-purpose blend will ensure the best bead appearance without burning through thinner materials. When working with stainless steel, though, adding helium to the mix will bolster corrosion resistance.

How small should the wire be?

While wires are often between .035” and .045”, you can create a stronger joint using a smaller diameter wire with the MIG approach. A wire with a .025” diameter will allow for total precision while preventing burn through. As for stickup length, roughly 3/8 of an inch is optimal. If you hear strange sounds—anything other than steady sizzling, your stickup is probably too long. 

Should you push or pull the gun when using the MIG system?

Because MIG welding is incredibly versatile, it responds well to both pushing and pulling techniques. Naturally, the best approach for any given project will depend on the circumstances. Pushing tends to produce a flatter, wider bead, while pulling allows for deeper penetration with a narrower bead. 

If you’re trying to complete a project, turn to Nadler Welding & Repair Shop in Wentzville, MO. Since 1951, this family-owned and -operated shop has been providing comprehensive metal fabrication and welding services throughout St. Charles County. Today, they even have portable equipment to perform jobs on site. To learn more about their unparalleled services, visit their website. To discuss your needs, call (636) 327-4404.