SESK: Stuff Everyone Should Know · sesk.info/weld-fcaw-no-gas
Which welding wire needs no external shielding gas?
Self-shielded flux-cored wire.
- Solid MIG wire
- Gas-shielded flux-cored wire
- Self-shielded flux-cored wire ✔
Why: Self-shielded wire carries flux in its core that makes its own protective gas. No gas bottle is needed.
Huh, didn't know that: Miller says self-shielded wire also gives excellent penetration on material 16 gauge and thicker.
Why wasn't the stadium hot after the game? Because there were so many fans.
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References
Answer: Self-shielded flux-cored wire. Self-shielded wire carries flux in its core that makes its own protective gas. No gas bottle is needed.
- 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
Self-shielding flux-cored wire does not require external shielding gas
Checked 2026-10-10.
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