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Old 05-04-2012, 03:11 PM
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Welding wire

Why is MiG flux core wire not as good as solid wire with Argon gas

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Old 05-04-2012, 05:01 PM
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Originally Posted by Franko48
Why is MiG flux core wire not as good as solid wire with Argon gas
It depends on what your application is, for some things mig (hard wire and shielding gas) is better, for some things flux core is better.

Flux core is not as clean as mig, you still have slag to clean from the weld, just as with "stick" welding. Flux core burns hotter than mig so it burns thru much easier on thin material.

For welding outside, or where you have a breeze, flux core is better. It doesn't take much breeze to blow your shielding gas away, the flux shielding protects the weld from contamination better. Flux core is also more tolerant of "dirty" steel with some dirt, rust, etc. It's still best to have clean material for the best weld. Flux core extends the range of material thickness of a mig welder (can weld thicker material) since it burns hotter, especially helpful with the 110 volt household current models since they're limited to 130-140 amps in most models. Most of them give settings for mig to 1/8" but settings for flux core to 3/16".
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