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SESK: Stuff Everyone Should Know · sesk.info/weld-fcaw-gas-shielded-slag

Which flux-cored type needs external gas and has easy-to-remove slag?

Gas-shielded flux-cored wire.

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  1. Self-shielded flux-cored wire
  2. Solid MIG wire
  3. Gas-shielded flux-cored wire ✔

Why: Gas-shielded flux-cored wire uses a gas bottle, and its slag comes off easily. Miller suggests it for thicker metals or out-of-position work.

Huh, didn't know that: Solid wire leaves no slag to remove, so it is ready to paint.

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References

Answer: Gas-shielded flux-cored wire. Gas-shielded flux-cored wire uses a gas bottle, and its slag comes off easily. Miller suggests it for thicker metals or out-of-position work.

  1. Solid Wire Versus Flux-Cored Wire (Miller) www.millerwelds.com/en-us/resources/knowledge-hub/mig-welding/how-to/solid-wire-versus-flux-cored-wire-when-to-use-them-and-why
    Gas-shielded flux-cored wires require external shielding gas, and the slag is easy to remove.
    Checked 2026-10-10.

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