This combination is a good choice when welding aluminum workpieces. It performs well for applications requiring increased penetration and improved bead appearance.
Argon and helium are two of the most commonly used shielding gases in welding applications. Argon is a popular choice because of its inert, nonreactive nature. Helium provides good thermal conductivity and broad, shallow penetration. It also improves the weld bead’s wetting.
A blend of argon and helium can enhance the properties of both gases and deliver better results. This combination also increases the voltage of gas metal arc welding (GMAW) and gas tungsten arc welding (GTAW) applications. It works well when welding nonferrous metals like copper, aluminum and nickel alloys and various reactive metals.
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Argon-helium is available in various ratios of the two gases. Helium is more expensive than argon, so blends with a higher helium concentration are usually more expensive. A limited global helium supply and the difficulty in sourcing the material can impact the mixture’s availability.
The percentage of helium in an argon-helium welding mix determines the gas’s usage. Generally, a higher helium percentage works better with heavier materials. A helium content of 10% or lower can affect the arc and the weld’s mechanical properties.
Examples of commonly used argon-helium mixtures include:
This combination is a good choice when welding aluminum workpieces. It performs well for applications requiring increased penetration and improved bead appearance.
This frequently used mixture is an excellent option for mechanized aluminum welding processes where the workpiece is more than 1 inch thick while lying flat. It also reduces porosity and increases heat input in copper welds.
A balanced mixture of argon and helium gas provides a high heat transfer and increases the energy supply to the weld pool. It also enhances fluidity and reduces the risk of sidewall fusion defects. The reduced weld prep effort leads to greater productivity and efficiency.
A low-argon combination provides increased heat input and enhanced weld coalescence when working with thicker copper or aluminum materials. Other uses include short-circuiting transfer with nickel filler metals.
Argon and helium are simple asphyxiants. Inhaling large gas quantities can displace oxygen and cause suffocation. Use and store the gas blend in a well-ventilated area away from other gases. Workers who handle the gas cylinders should wear appropriate personal protective equipment.
Our extensive network of gas suppliers can meet all your argon-helium welding gas needs. When you choose one of our partners, you’ll have access to expert advice to help you make the most informed purchasing decision for your business. You’ll also receive prompt, reliable service after the sale to maximize the product’s performance.
Learn more about argon-helium blends and how they can benefit your business’s welding processes. Contact Meritus Gas Partners for additional information and to find a supplier near you.