Mike, It always seemed to me that the Borax I was using (I just went to the grocery store and bought a box of borax soap, it wasn't 20 mule team) would eat up a lot of the steel that I was working with and sometimes I couldn't get it to stick, I was welding cable.
When I started welding Hawks I was surprised at how strong the welds were. I over drifted one on purpose and I could not get it to split.
I am welding 1050 and it works great, after the first series of light hammering it never gives any induction of coming apart. I would mention that I don't do any arc welding in the eye till it is almost finished so all the strength of the eye is tested.
As far as what it has in it I don't know. Gib
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