Originally Posted by
cyccommute
This really is a myth. I broke a frame back in the late 80's and had a machinist friend repair it. This is a guy who welds exotic metals, makes pressure vessels and fabricates lots of one off equipment for scientific experiments. He knows his stuff. Even he was amazed at how hard it was to weld the thin steel of a bicycle frame. He said it would be incredibly easy to burn through.
If you want to see a real life example of a repaired bike at a local blacksmith's near Outer Mongolia, look
here.
those welds look like they were done by a DC welder that had no idea what they were doing. I have done a little welding and could have done better then those on a DC. Better to use a t
ig welder where the heat can be controled and not burning holes thru the tubes.