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The use of gas plays a major role in the operation of welding. While the ability to reduce and heat relies heavily about acetylene, a wide variety of gases are employed as shielding gases for welding. Shielding gas prevents other gases inside the atmosphere from reducing the grade of the welding process. Shielding gas also has an effect on several other aspects from the process, including welding torch travel speed and the standard of the weld deposit in done form.

The type of shielding gas used depends on the arc welding method being performed and the material being welded. In order to meet the shielding gas needs of your particular application, gases are often times developed into special blends. Some elements commonly used inside these specialty gas combination's contain oxygen, nitrogen, hydrogen, argon, and carbon dioxide.

ArgonThe third most common gas within the Earth's atmosphere, argon is heavier than air and it has a low thermal rate involving conductivity. These qualities enable argon to provide solid arc welding stability and also penetration. Argon is also an inert gasoline, which allows it to provide without impacting the composition from the welded metal. As a shielding gas, argon is used on a unique for gas metal arc welding (GMAW) as well as gas tungsten arc welding (GTAW) on nonferrous metals for example aluminum and copper. It is also used in conjunction with other elements for GMAW and flux-cored arc welding (FCAW) projects concerning the joining of steel.

OxygenThe addition of Oxygen within shielding gases for GMAW assignments can enhance arc stability. It can also improve the fluidity and wetting characteristics regarding weld puddles by reducing area tension. When used in conjunction with fractional co2 and argon, oxygen can also provide versatility to joining certain kinds of carbon steel.

HydrogenUsed primarily on austenitic and duplex stainless steels, hydrogen is known for improving the weld puddle fluidity and cleanliness of surfaces. When added in small sums to argon, it can also provide excellent weld bead appearance and improve the travel speeds of GTAW projects involving austenitic steels by up to 25 percent.

NitrogenThis gas can improve weld transmission and arc stability of austenitic as well as duplex stainless steels. Additionally, it is used as a shielding gas additive to improve the mechanical properties and pitting resistances associated with super-austenitic and super-duplex stainless steels. Nitrogen also provides good actual protection for metal when used with 10 percent hydrogen. Please click the link for more information about heat shields for automotive and custom heat shields.