Metal fabrication incorporates a lot of processes such as cutting, milling, welding and more. There are two popular types of welding: MIG and TIG welding. MIG welding involves the use of an automatic or semi-automatic arc with the help of a consumable electrode. TIG welding, on the other hand, employs a non-consumable electrode. Apart from this major distinction, here are some other differences between the two metal fabrication services.
Based on weld strength, TIG welding is considered stronger than MIG. This is because of the narrow arc produced by the TIG welder, allowing deeper penetration of the metal’s surface. Moreover, the TIG weld beads are also strongly bonded and have fewer holes than a MIG weld.
When it comes to welding speed, MIG welding is faster than its TIG counterpart. This is mainly due to the broader arc of the welding machine, which enables easier cooling, which is further aided by the machine’s air-cooling mechanism.
Both processes use shielding gas to protect the weld from contamination, the types of gases differ and their flow rate differ greatly. MIG welding mainly uses a combination of argon and carbon-di-oxide while TIG welding uses pure argon. In terms of flow rate, MIG welders use more shielding gas per weld than TIG welders.
The end product of TIG welding is often more aesthetically pleasing than MIG welding. Since there is little to no spatter during the weld, even light polishing will suffice. However, MIG welding is still preferable if aesthetics and finishing are not important.
TIG welding has a rather steep learning curve. It requires the use of both hands as the filler rod has to be manually fed. It also requires control of a foot pedal which is used to adjust amperage. By contrast, MIG welding has no requirement for a foot pedal and the filler is fed automatically, so it is a lot more forgiving to new welders.
In conclusion, selecting a welder depends on the above-mentioned factors and differences. However, both are an indispensable part of metal fabrication.
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