On Jul 14, 9:58 pm, Peter Parry wrote:
On Thu, 14 Jul 2011 02:44:57 -0700 (PDT), Matty F

wrote:
I've not seen cast iron welded before. Anything to worry about?

Brazing is often preferred with unknown materials as cracking after
welding is very common.

The pipe is cast iron.

http://www.twi.co.uk/content/jk25.htmlhas some good articles on the
subject (you need to register for free access).