Thanks for the info Jesse. Your reply confirms what I was told a
while back about hydrogen having a much cleaner and hotter flame
than propane thus reducing the need for high levels of oxygen under
typical propane/oxygen melt conditions. I am a little familiar with
the type of forming gas (or argon) which you speak of for
eliminating oxygen above internal crucibles on high priced casting
units such as the nuetec or memco etc.
However, Im looking to melt with hydrogen/oxygen thereby replacing
my propane/oxygen setup. I was told by an old timer he used a
formula which he also termed forming gas that was (and this was
expressed to me a tad unclearly) 75% hydrogen and 25% nitrogen for
melting in place of propane. (?) Although I cast great with my
present propane/oxygen tanks, Im always striving to improve when
improvement is possible. Even if it cost a little more.
Hydrogen seems like the ideal gas to cast with. Other than the
safety concerns, it doesn’t smell, low radiation, it is not only
cleaner than propane, but hotter, which seems to be a great benefit
(porosity) if I need less oxygen to melt my metal; and yet I wonder
why more casters aren’t using hydrogen? Sure gonna do my homework on
the safety concerns. Is it the safety concerns that many don’t use
it? Just wanna make sure before I strike my match
Thanks again for your insight Jesse and to the many other Ochidians
for the important feedback on hydrogen.
Steve in Hawaii