How much argon for tig welding

Most of our content as you already know is in this website. However, from time to time we do publish special reports and resources in PDF. We try to put out as much as we can. Thanks for being a regular reader of our content. It is quite critical to apply TIG welding.

Thanks for the info. Can you advise on what AC current we should use for welding aluminium and also what AC balance? Hello Moss. Not sure about your question as to what AC current should be used. Does your machine have options for the AC current such as sinusoidal, triangular, square, etc?

As far as the balance it will depend on the condition of the material. Unfortunately we cannot do anything at this point about the resolution. If you have access to a desktop computer or laptop the image should be better.

Tungsten Diameter and Cup Size. Gas flow rates for TIG welding. Posted on Saturday, February 7, Regardless, we only recommend products or services we use personally and believe will add value to our readers. Please note: I reserve the right to delete comments that are offensive or off-topic. Leave a Reply Cancel reply Your email address will not be published. Thanks for this post you explained really good it may help me in my Tig projects and my career. While decreasing the flow rate reduces turbulence, keep in mind that a too-low flow rate can be easily disturbed, and it may not properly protect the weld or tungsten.

For consistent flow rate accuracy and quick adjustments, place the flow meter regulator as close to the torch or welding power source as possible. Minimizing long shielding gas hoses reduces pressure that can build up in the supply line and cause high surges of gas on arc starts. Prior to welding, a pre-flow of shielding gas of at least 0. Post-flow helps assure the weld is protected as the weld pool solidifies and shields the electrode from atmospheric contamination as it cools after welding.

For proper post-flow, hold the torch over the end of the weld until gas flow stops. Divide the welding amps being used by ten to determine the number of seconds needed to have a minimum post-flow for the shielding gas. A minimum of eight seconds is recommended, and 12 is my personal favorite. To remedy this, use shorter gas lines or increase the gas pre-flow time to purge the lines and eliminate the surge of gas before starting the weld.

Remember that you want to choose options that deliver the best coverage. Achieving long laminar flow — and a larger gas envelope with the least amount of turbulence — reduce the risk of weld contamination. Skip to content Supplier Directory Subscribe. The three most common shielding gases used for TIG welding are: percent argon : This gas offers many benefits, including availability, cost and good arc starting characteristics. Thanks to its lower ionization potential, argon produces consistent high frequency arc starts and a more stable arc compared to helium.

The mix ratio can vary, with most mixes using 25 to 75 percent helium. The greater the helium level, the hotter the arc becomes and the more arc starting performance and stability decrease. While helium is good for welding thicker materials, it can result in inconsistent arc starts because of its higher ionization potential. Helium is also less available and costs more. In addition to argon and helium, the gases in Group R1 are used for TIG welding and plasma welding, while gases in subgroup 2, which have a higher hydrogen content H are used for plasma cutting and backing forming gases.

Group I combines the inert gases. There are 3 or 4 subgroups in each group. The gases are classified from M1. The main component of these gases is argon. Oxygen O or carbon dioxide CO2 or oxygen and carbon dioxide three-component gases are mixed with active components.

The latter is not important in Germany. The gases in Group C are the most strongly oxidising, because the CO2 decomposes at the high temperature of the arc, producing large amounts of oxygen in addition to carbon monoxide. Both gases can be used for plasma cutting and forming. In addition to the oxidation behaviour, the electrical and physical properties in the arc also change according to the composition of the gas and therefore the welding properties.

For example, the addition of helium to the argon improves the thermal conductivity and the heat content of the arc atmosphere. Both lead to a more energy-rich arc, and therefore to improved penetration characteristics.