OK, I'm constructing an ATV frame out of 4130 cromolly. My question is all I have is a MIG welder, (Solar 2175) and have never done anything like this before with this type of alloy. I was told for a good weld with 4130, I need to TIG, but I don't have and can't afford a TIG just for this application. But I was told I could MIG with 100% argon and er70s-6 or es70-s5 wire. (I don't know which one of those I should use) But is this my only option, or could I oxy-acetelene it using a 4130 rod? I don't know which one is better, and don't really know the process of how to weld using a oxy-acetelene thorch. but I need the welds to be strong of course, but all stress points will be gusset. Any advice is appreciated.
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