Topcat2vin
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- N. Ireland
Hi guys, just wondering if I can get a gas suitable for stainless and mild steel. Would argon / 2.5% co2 be OK for mild and stainless?
Thanks
Thanks
You haven't got enough CO2 in the mix to weld steel nicely.
Neither. The stainless gas which is 2-2.5% CO2 is no good for steel.Are you referring to Hobbyweld 5 or the Argoshield Light?
Neither. The stainless gas which is 2-2.5% CO2 is no good for steel.
Then you need 2-2.5% CO2.Reading above 5% co2 would work if its not critical. What is meant in this case by critical?
Appearance, strength, longterm corrosion resistance?
For my application weld will not be seen but must be strong as it is subject to varying high/low temperature. Also reasonable chemical resistance needed.
Yes, most/nearly all TIG welding is Argon you couldn't use any amount of CO2 or O2 in the gas mix, as it reacts with the tungsten.Is the gas for tig welding mild steel pure argon? I had always thought it was. Is that because you have a slower weld so you control your penetration yourself and it gives a stable arc? Or is that a weak miss too? {I do not tig often, never on my own machine either, last time was over 10 years ago!)
Well this explains alot! I've just moved over to MIG from having only done TIG. Tried to use my 100% argon and seemed to be suffering with weld quality and couldn't get around it with settings.Yes, most/nearly all TIG welding is Argon you couldn't use any amount of CO2 or O2 in the gas mix, as it reacts with the tungsten.
In MIG/MAG on steel, you want a small amount of reactive gas to help with the way the electrode transfers to the puddle, and the way it wets out.