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Old 12-16-2019, 08:37 PM   #1
keyswitch1
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Default Welding question

I used my pro-mig Lincoln electric welder to install a patch panel on

my model a the other day.

It has been a long time since I used this and I forgot to hook the bottle up to

it. It is 75% percent argon and 25% carbon dioxde up.

Question is should I start over with welding the panel again[LIST]
Thank you for your help !!
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Old 12-16-2019, 08:42 PM   #2
holdover
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Default Re: Welding question

the gas acts as a shield, without it the weld may look terrible and not be sound.
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Old 12-16-2019, 09:33 PM   #3
1ton
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Default Re: Welding question

My guess is that you already have the answer to your question. Go with it and you will be happier in the long run.
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Old 12-16-2019, 09:36 PM   #4
Dennis Pereira
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Default Re: Welding question

I think I would grind the welds and have a look .
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Old 12-16-2019, 09:42 PM   #5
midgetracer
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Default Re: Welding question

Without the Ar/CO2, the welds must look bad and have no strength. Grinding them will show lots of pin holes.
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Old 12-17-2019, 08:10 AM   #6
77Birdman
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Default Re: Welding question

Are you sure you didn't use a flux core wire? One time I forgot to turn the gas on and I couldn't get the weld to work for *&*(*&, then I realized what I didn't do.
Having said that I would follow the #4 post. Then re-weld as necessary, be careful with the heat.
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Old 12-17-2019, 08:49 AM   #7
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Default Re: Welding question

agree with Birdman. You may have flux wire in the machine, it should have welded and looked like shit with the gas off. Check your wire spool.
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Old 12-17-2019, 09:31 AM   #8
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Default Re: Welding question

Gosh I love my MIG (Lincoln SP135) The sound when you get it "right" (frying eggs) is like music to my ears.


Want to re-learn use of a MIG? Try welding aluminum using the special "kit" and pure argon. It works - kind of.



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Old 12-17-2019, 12:15 PM   #9
d.j. moordigian
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Default Re: Welding question

Quote:
Originally Posted by midgetracer View Post
Without the Ar/CO2, the welds must look bad and have no strength. Grinding them will show lots of pin holes.
The pin holes are " porosity "..
You may even see through the weld! Weld with porosity is NOT a good weld..
The fellow that did the welding,..Look up the word porosity.
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Old 12-17-2019, 03:41 PM   #10
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Default Re: Welding question

Quote:
Originally Posted by Joe K View Post
Gosh I love my MIG (Lincoln SP135) The sound when you get it "right" (frying eggs) is like music to my ears.


Want to re-learn use of a MIG? Try welding aluminum using the special "kit" and pure argon. It works - kind of.


Joe K
Welding aluminum with a mig just takes practice. I once welded two pop cans together with one.
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Old 12-18-2019, 12:12 AM   #11
GB SISSON
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Default Re: Welding question

Pin holes and bubbles galore when I forget to turn on the gas. It is very ugly without the gas and you can just break off a bolt welded to a piece of strap with it....
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Old 12-18-2019, 05:16 PM   #12
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Default Re: Welding question

It took me awhile but decided to do it YOUR way and the best part the welds are a lot better !!!!!!!!!!!!!!! I think five cars may be to much at 72 ?

? Thank you all very much !!

Last edited by keyswitch1; 12-18-2019 at 05:18 PM. Reason: Correction
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