![]() ![]() The most important measured variables in MIG/MAG welding are wire speed (in meters per minute), amperage (in amperes), and voltage (in volts). If a welding table is used, the clamp can be mounted on the table, otherwise it must be attached directly to the workpiece. The clamp should be attached as close as possible to the weld seam. 5) The grounding cableīefore the welding system is adjusted, the grounding cable must be connected. If there is a draft, a little more gas is needed. There is a practical rule of thumb for this: Gas quantity (liters/minute) = wire diameter (millimeters) x 10 For example, if a wire electrode with a diameter of one millimeter is used, ten liters per minute are sufficient in a closed workshop. Next, the gas valve is opened and the gas quantity is adjusted. Inert gases, i.e., argon and helium and mixtures made from these, are used for this purpose. MIG welding is used for non-ferrous metals such as aluminum or magnesium. Steels – from unalloyed to high-alloy – are MAG welded with a mixture of argon and CO 2. Which process is ultimately used and the choice of shielding gas is also dependent on the parent material. MIG/MAG stands for metal active gas or metal inert gas welding. Steel has a much higher density than aluminum, and the same size of material is therefore about three times as heavy. Weight: This criterion is particularly relevant with regard to aluminum. Stainless steels, also known as chrome steel and aluminum, do not rust. Oxidation: If the workpiece has formed rust spots, it is steel. If there is a weak attraction between the material and the magnet, it is probably alloyed stainless steel. If the material is strongly attracted to the magnet, it is usually iron or low-alloy steel. Only steel, nickel, and cobalt are magnetic at room temperature. Magnet test: In case of doubt, a magnet can help to identify the material. Bright and sparkling suggests chrome-nickel alloys. Dull, dark gray indicates a high iron content. Visual impression: The trained eye can see at first glance whether the material is steel, stainless steel, aluminum, or another metal. In most cases, the welder is of course aware of the material in question. Long before it becomes a question of how the welder settings need to be applied, it is necessary to identify the metal the workpiece is made of – the basis for all further steps. ![]() When is the user actually ready for welding? When they’ve prepared the workpiece, put on their gloves and helmet, the system is switched on, and the gas hose is already connected? What’s next? Our blog article provides answers using the example of MIG/MAG manual welding. ![]()
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