"Nick Müller" wrote in message
...
Roger Shoaf wrote:

A friend of mine worked at a place that used hydrogen as their gas,

I don't think that you want H in an environment where steel is heat
treated of hours. Hydrogen will diffuse into the steel and will make it
brittle.

Nick
--

Isn't that what I said?

I don't think hydrogen would be good for all material as in
some cases it
may cause imbrittlement.

--

Roger Shoaf

About the time I had mastered getting the toothpaste back in the tube, then
they come up with this striped stuff.