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Which Gas is Used in MIG Welding? Key Gas Mixtures Explained

Discover the gases used in MIG welding, including argon and CO2 mixtures for different metals and welding applications.

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Video transcript

MIG welding typically uses a mixture of argon and carbon dioxide gases. This combination provides a stable arc and smooth weld bead, making it versatile for welding a variety of metals. Pure argon can be used for welding aluminum and non-ferrous metals, while argon mixed with CO2 is better suited for mild steel.

Questions and answers

  1. What gases are commonly used in MIG welding?

    MIG welding typically uses a mixture of argon and carbon dioxide gases to provide a stable arc and smooth weld bead.

  2. Why is argon used in MIG welding?

    Argon is used because it creates a stable arc and is especially effective for welding aluminum and non-ferrous metals.

  3. What gas mixture should be used for welding mild steel with MIG welding?

    A mixture of argon and carbon dioxide (CO2) is best suited for MIG welding mild steel.

  4. Can pure argon be used for all types of MIG welding?

    Pure argon is ideal for aluminum and non-ferrous metals but is not typically used alone for mild steel welding.

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