Mig Welding Tip #4 of 19...Use the right shielding gas

Mig Welding tip #4 is ...

Use the right shielding gas.

CO2 is good for penetration on thicker steel, but may be a little too hot for thin metal.

Use 75% Argon/25% CO2 for thinner steels as well as thick. Use only straight Argon or a Helium/Argon mix for aluminum.

mig welding tips miller mig

Straight argon for mig welding only works on really thin stuff. Everything else welds horrible with pure argon.

You can use a tri-mix for stainless steels (Helium / Argon CO2). or even 98% argon 2% oxygen in some stainless mig applications.

There are some authorities out there who recommend odd mixtures of gas like 82/18 argon/co2...the idea is that you can use the same gas for spray transfer mig and short circuit mig. The only problem is oddball mixes are very hard to get.

If you dont believe me, just watch the deer in the headlight look from your welding supply clerk when you ask for 82/18.

A very few welding supply stores will have it, others will think you're nuts.

Mig Welding Tip Articles

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.