Setup: Lincoln Precision TIG 185
Joining 4130 and Mild Steel
30 PSI on gas
150 on output setting
A couple of days ago I ran out of gas. So I took the tank back to my local filler. He asked me if I needed pure Argon and I said yes. I wasn't really sure, but I'd never heard anything about an Argon mix. I brought that tank home and began welding. Immediately I began having problems with gas bubbles rising out of the bead. I assumed it was a problem with the "pure argon" so I headed to Google. I found a few people recomending an Argon mix for ferrous metals. I assumed that was the problem so I took the tank back today and swapped it for a mix tank. This time I swallowed my pride and asked what I should have. He said I did need the mix and gave me a new bottle.
Problem solved, right??? Nope! I'm still having the same issue. I have also noticed a very visible redish color ring around the bead. I've seen this bead before when the gas has run out.
Can anyone steer me in the right direction here?
Here's what the bead looks like, after I ground the first bead out with an angle grinder.
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