Quote Originally Posted by birchy View Post
CO2 is an active gas and gives better penetration than Argon mixes. There's a bit of an urban myth going around that CO2 is crap but very few (if any) of the "welders" saying it have actually used CO2.
birchy ive used up 100,s of bottles of argon as a former welder fabricator with variuos fab shops much nicer welds with argon ,the co2 is crap and commonly used in the car trade and back street garages in my neck of the woods at least, i scored a fair bit of it from them for side work from home, both will do the same job but theres a noticable difference between the two when using it.