However, separate filler wire is used in the Gas Tungsten Arc Welding method. Also, in many other arc welding methods, the filler material is used as the electrode carrying the electric arc to the copper being weld. Instead, GTAW uses a non-consumable electrode to create a weld joint between the workpieces it can do this with or without filler material. While GTAW is similar to many arc welding processes, it does not weld like arc welding methods that pass the electric arc to the copper being weld using consumable electrodes. Gas Tungsten Arc Welding (GTAW)Īlso called TIG welding, Gas Tungsten Arc Welding (GTAW) welds copper in a way similar to most arc welding processes this means that GTAW involves the use of electric arc for heating and melting both the copper piece being and the filler material.Īs the molted weld pool cools and solidifies, it is protected from atmospheric effects by introducing a shielding gas such as argon or helium at the torch’s tip. In the GMAW method for welding copper, you need to deposit the filler metal with narrow weave or stringer beads this can be done using spray transfer. For thickness that exceeds this, a mixture of helium and argon is used. Generally, argon is used for thickness up to 6mm. The thickness of the copper section that you need to weld will determine the gas mixture needed. The use of Aufhauser Deoxidized Copper is also recommended this is a copper alloy or filler material with a 985 purity. When using the GMAW method to weld copper, it is recommended that you use ERCu copper electrodes. Additionally, there is a regulated setting for feeding the shielding gas. However, there is a difference between the two methods while a series of short rods are used by SMAW as the consumable electrode, the GMAW method automatically feeds a continuous ‘wire’ to the welding torch at a speed defined by the user. This means that the filler material used in this welding technique is an electrode. Gas Metal Arc Welding (GMAW)Īlso called MIG welding, Gas Metal Arc Welding (GMAW) follows the SMAW system for welding. These include Gas Metal Arc Welding (GMAW), Gas tungsten Arc Welding (GTAW), and Manual Metal Arc Welding (MMAW). However, we’re only going to discuss the most common techniques in this article about teaching how to weld copper. We will be teaching you that here.ģ) Final Word The Different Methods for Welding CopperĬopper can be welded via several methods. Considering the importance of the metal and its wide applications, you need to learn how to weld copper. There are several reasons for this including the metal’s thermal and electrical conductivity, malleability, high ductility, and resistance to corrosion. According to a report published in Forbes, demand for copper is expected to grow from 23.6 million tons in 2018 to just 30 million tons by 2027.įrom the above, it is clear that Copper is a highly sought-after metal today. It isn’t just Freedonia that expects the demand for copper to grow in the future McKinsey also expects the same to happen. As for the United States, the advances in construction spending are likely to increase the demand for copper in the country. Freedonia also expects India to become the fastest-growing market for copper by the end of the year with China being a close second. According to Freedonia, the global demand for copper is expected to increase by 4.2% during the current year to reach 36 million metric tons, valued at over $260 billion. The importance of copper can be gauged from its global demand. However, the point is that copper is an incredibly important metal with many applications so learning how to weld copper is in your interest. Okay, maybe that is a bit of an exaggeration. Today, copper is the metal that is holding our world together. However, this can sometimes make it hard to weld copper.Ĭopper ore was the first one successfully smelted some five-thousand years ago. A major reason for this is that copper is a good conductor of both heat and electricity. A material with great conducting properties, copper has a wide range of applications.
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