HI all, I'm a newbie here(and to welding) and this is my first post. Please excuse my ignorance to much of this.
I bought a lincoln MIG welder from home depot(or maybe lowes) about a year ago and have only been using it to weld mild steel with the provided mild steel flux core wire. I'm learning a lot and have a ton to learn.
At this point I'm only interested in using flux core, can't buy the tanks to do MIG currently.
My question is: I bought a 304 SS muffler and I believe the stock exhaust pipe on my truck is 409 SS, and I'm wondering if it's possible to weld this together with flux core. I've been searching for a SS flux core wire but can't find any. I was told by some friends who weld TIG to use 309 wire for dissimilar materials, but again can't find that in flux core wire.
Is this possible and is what wire do I need?
If it is NOT possible, my friend can TIG weld it, but I'd like to do it myself to learn and for practice. He is new to welding as well but knows how to do this. He just doesn't know much about flux core or MIG I guess.
Also, I don't care how the welds look or anything(as I'm often told is a downside to flux core), as long as they hold and don't break/rust.