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MIG (metal inert gas) and MAG (metal active gas) are the most common welding methods in Western Europe, the United States and Japan. Their popularity is based on the fact that they have high productivity and they are easy to mechanize.
MIG/MAG welding uses filler metals, in the form of a solid wire electrode or a tubular-cored wire electrode, fed through a welding gun. The filler metals are melted off continuously in an electric arc. The energy generated in the arc is created by an electric welding power source. The arc and the molten weld pool are protected by a shielding gas that flows out of the gas nozzle located on the welding gun.
Shielding gases for welding are either inert (MIG) or active (MAG). Inert in this case means that the gas does not react with the molten weld pool or the melting electrode. Inert gases include argon and helium. Active gases provide a greater opportunity to optimise the process and the properties of the finished welded product. Many materials, such as non-alloyed steel, require the use of an active gas to ensure process stability and reliability. Argon/carbon dioxide and argon/oxygen are examples of active gas mixes. MISON® shielding gases include a shielding gas that is optimal for each welding application.
By using an unconventional set of welding parameters, the traditional operational areas for MAG welding can be exceeded and consequently significantly increase productivity. This forms the basis for RAPID PROCESSING®, a concept for highly productive MAG welding developed by AGA.
MIG/MAG welding, as with all other welding, creates fumes and gases that are dangerous for the welder. This is why safety measures must always be observed.
To protect the welder from these fumes, high priority must be given to providing good ventilation in the welding area. Additional safety is achieved by using MISON shielding gases. These gases considerably reduce the level of ozone emissions typically found in the hot environment of fumes and gases.
The primary function of the shielding gases used in arc welding processes is to protect the molten electrode, the weld pool and heated metal from the damaging effects of the surrounding air, as well as creating the optimal circumstances for the arc.
We also provide safety instructions for working with extreme heat and shielding gases for arc welding.