It has been my experience that increasing the argon percentage decreases the required transition current for GMAW spray (And sometimes increases undercut). For metal cored wire I don't know how that correlates.
If the spatter loss is the same and the operating factor the same, all else should be the same.
Run a test and let us know :)
G Austin
Another thing to consider, is that the higher Argon percent used, the more of the deoxidising agents that make it into the weld. Most of the info I have available is for 100% CO2 Vs. 75% Ar, 25% COs, but basically, the more argon, the higher strength of the weld metal, because it will contain more Mn and Si. A Mfg data sheet I happen to have in front of me has the following data
100% CO2 = 1.15 Mn, 0.48 Si, 86 Ksi tensile, 76 Ksi yield, 26% elong.
75/25 = 1.36 Mn, .62 Si, 94 Ksi tensile, 83 Ksi yield, 25% elong.
This is fairly typical of what you would expect.
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