Quote:
Originally Posted by slug
to be correct, to use flux core wire ( inner shield) you must also reverse the polarity of the machine
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Very true. All sheetmetal work should be done with a MIG welder running hardwire (.025 or .030) and C25 (75% argon 25% Co2) sheilding gas or a TIG if one you know how to use one and have access to one. I design Oilfield Equip and all of the equipment that I design, I specify the weld procedure to use. There are 2 types of flux core wires. There is the cheap stuff you can pick up at Home Depot that does not require a shielding gas and there is the more expensive flux core that requires a sheilding gas that can only be bought from a welding supply shop. The misconception with flux core is that it welds like crap. This statment is so untrue as most average people do not know how to make flux core welds look good. Are you welding up hill or down hill. Are you pushing the puddle or dragging. All of these need to be taken into consideration when talking about welding. Flux core welding with a sheilding gas is used at almost every fab shop around for STRUCTURAL fabrication due to flux cores penetration.