may have over done the voltage.

[Sandmanbjj]

I had a small Crack in my seat bracket. so I cleaned off the rust with a wire wheel. grounded the bracket and touched it with my flux core welder. I now have a hole the size of a dime.
I put it to the minimum voltage and the hole is now the size of a quarter. I guess I will have to try something different.

 

[Denny]

Thicker material?

 

[Sandmanbjj]

yeah. I think the material is pretty corroded and I was hopeful. but I may have to just add a brace to a non corroded area. Most of the seat bracket is fine. So I will make due with making that work.
I am a novice, self taught (youtube) welder at best. so I know I don't have the skill set to do anything fancy.

 

[Snaker]

You can buy welding backing paddles, spatulas, etc to hold behind the weld in order to fill it in.
Made of copper, brass, bronze?
I have used a piece of copper plumbing coupler that I smashed flat to hold behind the hole.