How To Arc Weld Thin Square Tubing. Choice of weld process can also help control warping with Tig having the least amount of warp as it can have the least amount of heat input. Another tig welding technique that helps is to back up the arc while you are adding filler rod.
To begin the welding process you will need to cut two pieces of square tubing ensuring that both pieces have one 45 degree angled end. Tack About every 12 in some cases. Longer arcs make the puddle more fluid and will blow out on you.
You could also use thin walled mild steel 16 ga tube but its more expensive.
It is also known as arc welding. Lower arc control will have a tendency to snub out your rod. Thats just too thin to properly weld with stick in my opinion. Top claws are done and fashioned out of 3mm plate bent to shape and two 5mm tabs on top of it that also work as ribs they are as long as the claw itself following the curve of the plate making it impossible to un-bend.