The objective is to optimize the mixture for each specific welding situation. It is done by drawing on the benefits of both chemicals while minimizing the drawbacks as much as possible.

There are alternatives to the suggested gas mixtures mentioned in this chapter. One alternative is to partly or completely replace CO2 with oxygen. Since these mixtures have a limited usage, they are not mentioned further in this context. Additional information regarding these shielding gas mixtures can be obtained from the gas manufacturers.