Monel was invented long long before 1976 my friend. It was used in
steam
turbines in the 19-teens among other things.


Scott Vernon wrote:
For the bypass valves, too?


Dunno. Hi-pressure hi-flow steam valves have some of the innards made of
some exotic metals, but IIRC it's hi nickel chrome steel, not Monel.

Advances in metallurgy is one reason why stuff lasts so much longer now
than it used to.

DSK