Welding Gases
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Basics
- Most modern forms of welding use some form of Shield Gas to protect the Weld Pool from the atmosphere
- In the simplest form this is a pure Inert Gas
- In some instances, various aspects of the weldment can be modified via using a gas mixture, often with a Reactive Gas
- In the older terminology (Pre-GMAW ), there was Metal Inert Gas (MIG) and Metal Active Gas (MAG)