[ Craig Brougher wrote in 000309 MMD: ]

> Years ago, broken cast iron manhole covers were always repaired
> with braze, but engine blocks were always arc welded. ...

I think we have a confusion of terms going on.  Welding does not
necessarily mean electro-arc welding.  The process and practitioners
I referred to use an oxy-acetylene torch and melted rod as a medium.
As far as I know, arc welding is not a reliable way to join cast iron.

I think acetylene torches predate arc welding, and their use for
joining is still called welding.  Brazing, by its name, refers to the
use of brass rod or compound at a lower heat than welding.  I just
double-checked Webster's dictionary, and braze does seem to refer
to brass.

Larry Mayo