Air Products’ shielding gases are commonly used in several welding processes, mostly MIG/MAG and TIG welding.MIG (metal inert gas) and MAG (metal active gas) welding are widely used wherever medium and high fusion rates are required. Both techniques use a DC arc burning freely between the workpiece and a wire electrode, which functions simultaneously as a power carrier and a source of filler metal. For MIG welding, the gas is inert: argon or an argon-helium mix. MAG welding uses a mixture of argon with an active gas such as oxygen, CO2 or both. Air Products standard gases are available in traditional cylinder sizes at 200 bar and 300 bar cylinder pressure.