How does K-TIG compare to MIG welding?
MIG/GMAW is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece joint, the consumable wire transfers melted droplets across the arc creating a molten weld pool which joins the material.
MIG/GMAW is a low penetration process which requires extensive edge preparation and consumption of filler material. It is commonly used for welding carbon steels and stainless steels, but its use on exotic materials is limited due to higher defect rates due to reduced weld pool fluidity.
MIG/GMAW is considered to be highly susceptible to defects such as inter-run fusion and side-wall fusion, and considerably more susceptible to porosity than K-TIG. The Oil & Gas, Petroleum and Chemical industries will generally not accept MIG/GMAW for pressure vessel welding applications due to the higher defect risk and associated increased welder skill required to minimize these types of defects.
By contrast, Keyhole TIG is a full penetration GTAW process which uses a non-consumable electrode, eliminates or minimises filler consumption, and is suitable for most industrial metals and produces high quality results when welding exotic alloys.
By contrast, K-TIG is a full penetration single pass GTAW process which uses a non-consumable electrode, eliminates or minimises filler consumption, and is suitable for most industrial metals and produces high quality results when welding exotic alloys. It is ideally suited for welding pressure equipment, static & dynamically loaded structures where defect free welds are a critical requirement.
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