Thank you guys so much. I’m using 304 from multiple venders but will try out the 321. I don’t want to passivate because I and exhaust enthusiasts love those colors. But I do think arc length and heat input is the issue. I’m still new and need some work with my technique. I might need to speed up a l...

I can't see photo. let me know if you can.

Hi everybody, my name is Chris and I'm new here. I'm learning how to weld stainless tubing to make headers and exhaust for motorcycles. I've been doing a lot of practice with autogenous welding with pulse. I have a lot of practice tubing that's been sitting around for a couple months and noticed alm...