Tungsten Inert Gas welding (TIG) leaves a very precise weld with a smooth finish.   Due to these factors TIG has increased in popularity in the automotive industry.

• Although many metals are TIG welded, the metal most frequently associated with the process is aluminum, especially with metals of a smaller thickness.  
• Mechanically strong and visually appealing, TIG welding is the number one process chosen by professional welders for professional racing teams, and the avid auto enthusiast or hobbyist.
• The process is well suited for aluminum, but there are a few characteristics of the metal that bring up points that must be considered if this material is to be welded with consistent ease and quality.
• Aluminum is an excellent conductor of heat. It requires large heat inputs when welding is begun, since much heat is lost in heating the surrounding base metal.
• The metal produced in the weld pool is a combination of filler and parent metals that must have the strength, ductility, freedom from cracking, and the corrosion resistance required by the application.
• Good weld quality is obtained only if the filler wire is clean and of high quality.
• Pieces to be welded are usually formed, sheared, sawed, or machined prior to the welding operation.

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