On 2/2/2012 4:42 PM, Tom Gardner wrote:
"Steve wrote in message
.. .
Just how much strength is lost when heat is used to straighten something?
I know it varies with the amount of heat applied, and over what area, but
is there any general statements that hold true across the board?

Steve




If you're talking tool steel, with enough heat you will anneal it. What do
YOU define as "strength"...tensile, compressive, shear???




On a slightly more exotic metal...

I recall Kelly Johnson saying that the service life of the Blackbirds
(YF12 / SR71) should be about infinite.

They annealed themselves every flight!