WTT-Banner-first-order10-percent-2025

How to TIG weld a carbon steel lap joint

11ga-cold-rolled-lap-joint-tig

...Introducing the New WeldMonger Challenger TIG kit that includes the most frequently used Cups. 

challenger kit 17 front
challenger kit 17 contents

In this quick video Welderskills.com instructor Andrew Cardin demonstrates on how to tig weld a carbon steel lap joint on 11ga cold rolled steel.

Cold rolled steel 11ga (.125" thickness)  

DCEN 122 AMPS

Jazzy 10 ceramic cup 

30 cfh argon flow rate

post flow set to 10 seconds

3/32" 2% lanth electrode

1/16" ER70S6 Filler wire

You might like these

Welding a carbon steel lap joint boils down to a few key factors.

  • amperage setting
  • filler wire size and type
  • arc length
  • torch angle
  • shielding that hot tip of the filler rod

An amperage setting of one amp per thousandths of thickness will get you in the ball park.

Filler wire size is mostly personal preference but for 11ga cold rolled steel a 1/16" diameter ER70S6 filler wire works pretty good.

arc length should be equal to or less than electrode diameter

torch angle is pretty forgiving provided arc length is tight ..try to limit torch angle to around 20 degrees.

the hot tip of filler wire gets oxidized if not shielded by argon.  try to keep the hot tip of filler wire in the argon envelope.

WTT-Banner-first-order10-percent-2025

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.
var l = window.location.href, d = document; document.write('<form action="#"><div style="text-align:center"><textarea cols="50" rows="2" onclick="this.select();"><a href="'+l+'">'+d.title+'</a></textarea></div></form>');