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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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MIG (GMAW) welding SS gas question
Greetings all,
We ran out of Ar/He (75/25 I think) mix while welding some 3/4" SS today. The "weldor" loaded a bottle of Ar/O2(95/5). Then he wanted me to come see how "funny" it was welding. I _know_, you are supposed to use a tri-mix, but hey, what does it matter as long as it works, right? NOTE My last sentence was meant to be very sarcastic, but it is also the mentality of most of my co-workers. GGGRRR!! rant off OK, my question; What affect will the absence of the He and/or the presence of the O2 have on the weld quality? It seems to be a lot hotter weld and also a lot "smokier" Thanks in advance, Jim C Roberts |
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In article , Jim C Roberts wrote:
Greetings all, We ran out of Ar/He (75/25 I think) mix while welding some 3/4" SS today. The "weldor" loaded a bottle of Ar/O2(95/5). Then he wanted me to come see how "funny" it was welding. I _know_, you are supposed to use a tri-mix, but hey, what does it matter as long as it works, right? NOTE My last sentence was meant to be very sarcastic, but it is also the mentality of most of my co-workers. GGGRRR!! rant off OK, my question; What affect will the absence of the He and/or the presence of the O2 have on the weld quality? It seems to be a lot hotter weld and also a lot "smokier" Thanks in advance, Jim C Roberts If it is too hot you will get chromium carbide formations and lose your rust resistance. |
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