On Thu, 14 Mar 2013 11:34:27 -0400, Ed Huntress
wrote:

On Thu, 14 Mar 2013 09:38:40 -0400, "Stormin Mormon"
wrote:

Do any metals contract, on heating?

There are special formulations of Invar that have a slightly negative
thermal coefficient. The common grades used in industry are close to
zero.

Negative up to about the Curie temperatu-
http://umpir.ump.edu.my/1208/1/Negat...romagnetic.PDF

Interesting that it's still negative down at liquid Nitrogen
temperatures.