Originally posted by starchland
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MIG has the smallest heat effect zone, but can't be hammered on or it loses it's integrity. TIG has a larger heat effect zone and can be hammered to a degree without losing integrity. Oxy/Ace welding has the largest heat effect zone and can be hammered far beyond MIG.
In general, all bodyshop's do nothing but MIG weld. Simply because they generally don't need to hammer or shape the panels after welding. In most cases, the metals are preshaped and are what I consider "drag and drop, stich in".. TIG and Oxy welding sheet metals are more for hotrodders and custom panel fabrication where you may need to weld two parts together and then shape them as one on an english wheel/shot dolly.
Everyone laughs when I tell them to READ! READ! READ! As if the only way to learn to weld is by doing it, WRONG! The fact of the matter is, you can be a welder for 25 years and still not be a professional if you never learned the proper methods and practices.
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