Welcome to the world of Tig welding! With the ever-increasing demand for quality welding, it’s essential to understand the different types of welding and the gases that are used for them.
According to the International Institute of Welding (IIW), more than 5 million metric tons of welding related gases are used every year for welding around the world. Out of these gases, Argon is a noble gas that plays a vital role in TIG (Tungsten Inert Gas) welding.
In this article, we’ll take a closer look at the type of gas used for Tig welding.
What Kind of Gas is Used For Tig Welding?TIG welding, also known as Gas Tungsten Arc Welding (GTAW), is a popular welding process used in many different industries.
The TIG welding process utilizes an electric arc that is formed between a non-consumable tungsten electrode and the workpiece. This arc creates a highly concentrated heat that melts and joins two pieces of metal together. In order to achieve optimal results and ensure a successful weld, the proper gas must be used to shield the molten weld puddle from the surrounding atmosphere.
Why is Shielding Gas Necessary?The purpose of shielding gas is to protect the welding process from the surrounding atmosphere. Oxygen, nitrogen and hydrogen in the atmosphere are the main causes of poor weld quality and porous welds.
By using a shielding gas, the quality of the weld is improved and the chances of the weld becoming contaminated are reduced.
Types of Shielding Gases Used for TIG WeldingThere are three main types of gases used for TIG welding: pure argon, pure helium and argon-helium mixes.
Each of these gases has its own advantages and disadvantages, so it’s important to consider the type of material being welded and the desired results when selecting a shielding gas.
Pure ArgonPure argon is the most commonly used shielding gas for TIG welding. It provides a deep penetration and offers good control of the weld puddle.
Argon is especially well-suited for welding steel and stainless steel, and is generally considered the best choice when welding thin materials.
Pure HeliumPure helium is used primarily for aluminum and magnesium welding, as it provides higher heat than argon and results in deeper weld penetration.
The higher heat also requires more skill when welding, so it’s generally not recommended for novice welders.