The Tungsten Inert Gas (TIG) welding
       The Tungsten Inert Gas (TIG) welding process provides high-quality welds. Although it requires great skill and precision. TIG welding is widely used in various industries for welding a wide range of materials. TIG welding can be a manual or automatic process, and it is particularly suitable for welding high-alloy steels and color metals such as:
  • aluminum;
  • copper;
  • nickel alloys.  
        The process initially relied on pure graphite or pure tungsten electrodes, later transitioning to alloyed tungsten electrodes with better welding and technological properties. 

Manual TIG welding

        Manual TIG welding requires high skill levels, but it provides excellent weld quality and is widely used for welding short seams or tacks during construction assembly. It is also used for welding critical parts that require high precision and accuracy. On the other hand, automatic TIG welding is suitable for welding long-length seams in production settings, with a controlled and automated process. 

 TIG welding has evolved

        Initially, helium was used as the shielding gas, but this was later replaced by argon as it is cheaper and better protects the weld.
       Welding before was carried out with a direct current of reverse polarity, while the electrode was connected to a positive potential (DC+). Welding of light alloys has switched to alternating current (AC) and welding of other metals has switched to direct current of direct polarity, where the electrode is connected to a negative potential (DC-).
        Aluminum TIG welding is performed on alternating current (AC), creating a special environment ideal for precision welding aluminum components. The controlled temperature in TIG welding allows the operator to avoid thermal deformations that can damage the structural and mechanical properties of the aluminum workpiece. 


        The primary advantage of the TIG welding process is the high quality of the weld for almost all metals and alloys (including hard-to-weld and dissimilar ones, such as aluminum with steel). TIG welding provides good visual control of the weld pool and arc, due to the absence of metal transfer through the arc, there is no spattering of metal. 
        It is widely used in various industries, including aerospace, automotive, and shipbuilding, due to its precise control of heat input and the ability to produce a clean weld that does not require post-weld cleaning.
        The TIG welding process can be applied to weld any thickness using edge preparation. However, it is mainly used for welding with thicknesses ranging between 0.3-4.0 mm. 


        TIG welding is a widely used welding process that provides high-quality, precise welds. Depending on the application and materials to be welded, TIG welding can be performed manually or automatically using a variety of electrodes and shielding gases. With its ability to weld high-alloy steels, color metals, and thin materials, TIG welding is a preferred method in various industries.
        The TIG welding process is evolving, with modern technologies and techniques being developed every year. As such, it remains vital for engineers, professionals, and specialists to keep up to date with the latest innovations and advancements to make informed choices in their welding processes. 
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