Can someone tell me about the finish on 4130 plate? I've been using .190" thick 4130 and the surface finish is a light mill scale brownish color. It's easy to buff off before I weld it. I recently bought plate from McMaster-Carr and its finish is much smoother more shiny grey color. I don't kno...

Thank you to everyone that has replied. It has been very helpful. Just to recap and understand what I've heard, trying to weld the .120" wall tubing to the 3/8" plate is not really doable with my welding unit. And trying to get a puddle on the 3/8" plate alone will not happen because ...

Hey guys I'm new to this forum and welding aluminum. I've been tig welding 4130 for years and need to learn how to weld 6061. I'm going to be welding 1"x .120" wall tubing to 3/8" plate. I'm thinking about practicing on putting beads down on the 3/8" plate but don't know where to...