Welding Gas Mixtures are excellent depth of weld penetration and has greater gap bridging with stronger plate joins producing quality welds. This mixture helps in smoothly weld surface finish and posses good mechanical characteristics. Helps in increasing welding speeds, it also increase puddle fluidity that may make out-of-position welding more difficult. A blend of Ar and oxygen (O2) is generally used for conventional and pulsed spray transfer on clean, plain carbon and stainless steel.