Saxon liquid steel

[MushiSushi]

picked this up from Don Fogg's site and though the link ought to be copied here too

http://www.bradford.ac.uk/acad/archsci/depart/resgrp/amrg/steel.htm

[MushiSushi]

OK Simon's been finking ...... uh oh ;)

why do people make the venturi type burners out of cast iron fittings when they have a lower melting point? ... 1200C .. which is below welding temps... Why not just weld them up out of mild (1500C) or stainless (1426C) steel?

[Chris Barry]

From what I can see usually the burners are made from cast iron because plumbing fittings are made from these. It is easier to screw bits of pipe together than weld them.

Because the air drawn through the burners is at room temperature it cools the metal. The only part of the burner that should get hot is the flare, if it is running outside the forge. Inside the forge there isn't a need for a flare, the inside can be shaped to serve the same function.

[Herr_Mingus]

nice thread mushi , being a re-enactor of the 10th C this is particulary relevent to me.