Reducing the carbon dioxide content decreases the transition current for spray transfer, and therefore
mixtures containing 15% or less carbon dioxide are more conveniently used for spray transfer. When
the argon content is 85% to 92%, good penetration and smooth bead appearance are obtained. The
current required for spray transfer is still reasonably high and the resulting higher arc energy and good
penetration makes this gas composition range suitable for welding thicker materials.