SCHWARZ AG FEINBLECHTECHNIK is set up for MIG welding, procedure number 131 according to EN ISO 4063 and MAG welding, procedure number 135 according to EN ISO 4063.
MIG stands for Metal Inert Gas welding, meaning fusion welding with a consumable wire electrode using shielding gas. The shielding gas is ‘inert’, that is, the electrode and melt are not affected. The weld penetration behaviour or the arc stability can nevertheless be affected by an admixture of impurities (in the ppm range).
MAG stands for Metal Active Gas welding, meaning fusion welding with a consumable wire electrode using shielding gas. The shielding gas is ‘active’, that is, the melt can be affected in a variety of ways, e.g., weld penetration behaviour, microstructure formation, etc.
MIG or MAG welding allows a smaller heat input, resulting in less deformation of the component and thereby less straightening. A further advantage is that MIG/MAG welding is faster. This procedure is especially suitable for longer welding joints and components with a high percentage of welding.
A disadvantage should be mentioned, namely that MIG/MAG welding results in more melt loss and reworking using the TIG procedure is called for due to the more difficult monitoring of the weld pool for weld toe joints and welding in tight spots.
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