anybody know the flame temperature of a gasoline "plumbers blowtorch"
type stove when it's burning blue? the kind in the center-left of this
picture, on the dolly...

http://machines.freehostia.com/sasge...s/photo63.html
babbitt_pouring06.jpg

I want to use it to pre-heat (heat soak) a pretty large piece of steel,
prior to brazing some stuff to it...

thanks for info guys :-)

toolie