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Ok i am trying to learn this. Ive been told that welding with a 75/25 gas mixture will get you the nicest welds and surpasses welding with flux core. But then ive also been told if you have a smaller welder such as a 120v welder that you will be able to weld thicker metal with the flux core. Is what i am being told correct?
Basically yes, and yes. It depends on what and where you are welding. MIG has a purpose. Flux core has a purpose. If there was only a need for one, the other would not exist.
I have to explain you, that you have 2 types of fluxcore, innershield which does not use gas and dual shield that uses gas, they are both fluxcore wire that uses mig as a method of welding. Actually one does not exist without the other.