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Mig welding question
Range Rover Blues:
What is the difference, I can't find out.
topless matt:
There is no difference, most people only say mig because it is the shortened version of what it is supposed to be which is MIG MAG welding.
dxmedia:
Metal Active gas (Mag) and Metal Inert gas (Mig)
The active gas in the addition of oxygen (CO2) whilst the inert is Argon. Argo shield IIRC has a mix of about 10 - 20% co2.
The mig mag welder I've got recommends running a +ve earth when using CO2 and a -ve earth when using argon based. I can't remember the chemistry but I bet it's to do with the way the electrons go when everything is oxydising.
TBH other than a smoother finish (less diming) I've never seen any real difference between using £15 co2 and ££££ argo shield. I'm not a professional welder though so take all of the above with a pinch of salt.
Saffy:
--- Quote from: dxmedia on June 10, 2010, 13:36:52 ---I've never seen any real difference between using £15 co2 and ££££ argo shield.
--- End quote ---
ARGON and argon mix is a third cheaper in the Halifords here compared to C02.
hairyasswelder:
--- Quote from: Saffy on June 10, 2010, 13:43:22 ---
--- Quote from: dxmedia on June 10, 2010, 13:36:52 ---I've never seen any real difference between using £15 co2 and ££££ argo shield.
--- End quote ---
ARGON and argon mix is a third cheaper in the Halifords here compared to C02.
--- End quote ---
Read the label ;) you only get half the gas :P
Only use argon5 at work or pure 99.9% argon. Got a CO2 bottle at home for the odd bits and argon mix runs alot cleaner.
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