On Mon, 21 Feb 2011 13:13:29 -0800, Rich Grise
wrote:


And inco 625 almost _is_ nichrome except for some non-neglible amount of
molybdenum, which probably helps with high. temp tolerance, if I'm guessing
in the right ballpark.

My SWAG is the moly improves yield strength at high temperature. Moly
itself is an excellent material for heating elements in reducing
atmospheres up to at least 2600F, but it oxidizes badly in air at
relatively low temps.

--
Ned Simmons