Shielding gases are essential in many welding applications for several reasons. They protect the molten metal from other potentially harmful atmospheric gases that can negatively impact the workpiece. They also help prevent damage to the electrode and weld pool from excess oxygen.
Argon (Ar) works well as a shielding gas because it is inert and won’t react with other substances. This substance also produces cleaner, stronger welds and offers excellent corrosion and oxidation protection.
However, combining pure argon with other gases is sometimes necessary to improve welding results. Carbon dioxide (CO2) is beneficial in metal inert gas (MIG) applications for steel because it increases penetration, boosts weld speed and enhances mechanical properties. Introducing a small amount of hydrogen (H) to the mix can improve arc stability and bead wetting in pulse MIG welding projects involving stainless steel.
The advantages of combining these three gases include increasing arc temperature, narrowing the arc and improving weld penetration. The Meritus Gas Partners supplier in your area can provide a high-quality argon-carbon dioxide-hydrogen welding mixture to achieve these objectives.
As with many tri-mix gases, this combination’s cost and availability depend on several factors. The price of each gas in the blend fluctuates, which impacts its overall cost. The percentage of each gas in the product will also affect the price. Each gas’s availability can vary with supply and demand, which can lead to surpluses or shortages in different areas.
You can find this blend in various gas combinations, with most containing a high argon percentage and a low hydrogen content. The most common application for an argon-carbon dioxide-hydrogen welding mixture is improving arc stability and bead wetting in stainless steel MIG welding projects.
You can also use this gas blend when working with low-alloy steels. However, the hydrogen percentage should not exceed 2% to minimize the risk of developing excessive metal weld levels that result in poor mechanical properties and cracking.
The Occupational Safety and Health Administration classifies argon-carbon dioxide-hydrogen as a hazardous material. The gas cylinders contain gas under pressure that could explode when exposed to extreme heat. Asphyxiation is also a threat, as the gas could cause suffocation by displacing atmospheric oxygen. Always use and store containers in a well-ventilated area away from direct sunlight and other potentially dangerous or toxic materials.
Our suppliers are the best option when looking for argon-carbon dioxide-hydrogen welding gas in your area. Our extensive network of independently operated distributors consists of local, family-operated businesses that make customer service the top priority. Get expert product selection assistance and other value-added services to maximize your experience. You’ll also find an assortment of gas equipment to improve your processes.