welding gases welding gas mixes

Welding Gas Mixes

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LT REQUISITIONS can supply welding gas mixes anywhere in the United States. We have gas blends that are designed to maximize deposition rates while minimizing cleanup due to spatter in all variety of welding applications including:

  • MIG welding
    • Globular
    • Short Circuit
    • Cold Metal Transfer
    • Spray
    • Pulsed Spray
  • TIG welding

“The choice of a shielding gas depends on several factors, most importantly the type of material being welded and the process variation being used. Pure inert gases such as argon and helium are only used for nonferrous welding; with steel they do not provide adequate weld penetration (argon) or cause an erratic arc and encourage spatter (with helium). Pure carbon dioxide, on the other hand, allows for deep penetration welds but encourages oxide formation, which adversely affect the mechanical properties of the weld. lts low cost makes it an attractive choice, but because of the reactivity of the arc plasma, spatter is unavoidable and welding thin materials is difficult. As a result, argon and carbon dioxide are frequently mixed in a 75%/25% to 90%/10% mixture. Generally, in short circuit GMAW, higher carbon dioxide content increases the weld heat and energy when all other weld parameters (volts, current, electrode type and diameter) are held the same. As the carbon dioxide content increases over 20%, spray transfer GMAW becomes increasingly problematic, especially with smaller electrode diameters.

Source: https://en.wikipedia.org/wiki/Gas_metal_arc_welding