TIG welding gas

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Welding made easy with MIG gas

Welding using a metal inert gas (MIG) welder is really not difficult. Using a MIG welder is easy with the right MIG gas. Plenty of MIG gas options MIG welding is a simple, easy and popular welding process that uses electricity and MIG gas to melt and join metal. Luckily, when it comes to picking the right gas to use, there are plenty of options. Why do you need MIG gas? You need MIG gas in order to shield the weld from the air. But it’s not just the case of picking a MIG gas randomly. Basically, you need to make the right choice of MIG gas to: Determine the depth of the weld Determine the characteristics of the welding arc Determine the weld’s mechanical properties. How to get your gas choice right Rent Free Gas can help advise you as to what is the best MIG gas to use in your particular case. Argon can be used for your MIG welding, especially for steel and aluminium, and Argon 5-2 is also great for mild steel welding. Some other common MIG gases are CO2 and Oxygen, with Helium being the least common. Often, these gases will be fixed together, although Argon and carbon dioxide can be used as a pure MIG gas. In many cases, up to three MIG gases can be combined; typically Argon, CO2 and Helium, or Argon, CO2 and O2. Pure CO2 as a MIG gas can produce the deepest penetrating welds, although the welds can also be rough. A MIG gas made up of CO2 and Argon is very popular, although if you are welding stainless steel, the best MIG gas mix is probably mostly Argon and CO2. MIG gas advantages Welding with MIG gas is great, because: Welding a large number of metals and thicknesses is easy The welt bead is good Weld splatter is minimised Welding with MIG gas is easy to learn and master. MIG gas disadvantages Welding with [...]

What is TIG welding gas?

Tungsten inert gas (TIG) welding is a form of arc welding most commonly used to weld stainless steel, aluminium, magnesium, and copper alloys. No sparks or spatter, flux, slag, smoke or fumes are produced by the TIG welding method. Types of gas used in TIG welding The primary gas for TIG welding is argon (Ar). Often helium (He) is added to increase penetration and fluidity of the weld pool. Argon is what is called a shielding gas. It protects the welding area from oxygen and nitrogen which can cause fusion defects. It’s a colourless, odourless and non-toxic gas. The thickness of the material to be welded will determine whether other gases such as hydrogen (H), carbon dioxide (CO2), helium (He) and oxygen (O2) are needed to be mixed with the argon. These additional gases will help maintain the quality of the weld in thicker metals. The gas flow for TIG welding shouldn’t be lower than four litres per minute and can go as high as 12 litres per minute, depending on the specific task. By adjusting the composition of the welding gas, you can influence the distribution of heat to the weld and by extension, the weld metal cross section and its speed. Gas mixtures that include helium are often more expensive but result in higher quality results for thicker metal. The typical Ar/He gas mixture is 25% He to 75% Ar. Any percentage above 25% He tends to create instability at times. Be informed about TIG welding gas Before using TIG welding gas for any job, it’s important to identify the best method of welding for the material that is to be welded. This may also inform what gas mix to use. Once the appropriate method of welding has been chosen, the thickness of the material to be welded should be noted for the purposes of further determining the gas mix and the proportions of the mixture. Finally, it’s important the correct safety measures [...]

5 advantages of using TIG welding gas

To start, what is TIG welding gas? Well, TIG is short for tungsten inert gas. TIG welding involves using a tungsten electrode to send a current to your welding arc. While the current does its job, the tungsten and the puddle weld are kept safe with the help of an inert gas, which both protects and cools. TIG welding has been around since the 1930s and was used to keep aircraft together during the Second World War. It’s also worth knowing that TIG welding is often called GTAW, which stands for gas tungsten arc welding. So, what are the advantages of this 80-year-old technology? 1. More control The best-known benefit of TIG welding is that, when compared with other methods, it puts a lot more control in the hands of the welder. By moving your foot, you can change amperage and heat levels quickly. So it’s perfect for working on complex, tricky details. 2. Less amperage How is that an advantage? Well, a decreased amperage lets you work more easily on small and thin pieces of metal, which don’t respond very well to high levels of amperage. 3. Work with various metals Being inert, TIG welding gas can be used on a variety of metals. If you’re working with copper or stainless steel, you should go for Argon or a mix with helium, but if it’s titanium you’re dealing with, make pure   argon your choice. And what about aluminium and aluminium alloys? They love a blend of helium and argon. 4. Increased flexibility Working on a project that involves a mix of small and large parts? With TIG welding gas, you can swap between the two without any hassle. It’s one of the most flexible welding techniques. 5. No slag! Let’s face it, cleaning up slag is the least fun part of welding. When you’re using TIG welding gas, there’s no need to worry about that! TIG welding is incredibly clean and doesn’t leave a [...]

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