Is it necessary to use shielding gas on metals 24 gauge thick to 18 ga. thick for mig welding. I'm asking because I'm trying to leanr about mig/wire feed welding. I don't see myself doing anything that requires shielding gas just to hold down the splatter. But on lighter stock between 24-18 ga. would I risk burning thru the metal without a shielding gas.
Second question. Most common shield gas is 75% argon & 25% CO2. Is this gas mixed in one tank or do I need two individual tanks. I want to be able to weld 24 ga. up to 1/4" thick stock, but not looking to do any fine detail work so if I can eliminate the gas & get results that's all I'm looking for. I don't want to spend money on systems or consumables that are not necessary to my goals. My welding projects will be limited to myself. And with the cost of steel around here, I can generally buy a completed implement far cheaper than building it from the ground up. So this just makes welding for me a hobby rather than a necessity. Thanks