On Thu, 2 Feb 2012 21:48:40 -0800, "Steve B" wrote:


"Phil Kangas" wrote in message
...

"Steve B" 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 (are) there any general statements that hold true across the board?

Steve

General? Yah, don't touch it, it's hot!
And you don't know more? You're the 'expert'
around here ya know...... ;)}

Just looking to learn, Phil. Unlike some people, who already know
everything. You're turning into an irritating stalker, my friend.

You are formally hereby dismissed.

Steve


Steve, the answer to your question -- whether or not there's some
generalization that you can apply -- is an unequivocal "no." If you
have something you've straightened with the help of heat, and if you
describe the material, how you heated it, and how you cooled it, we
can make an educated guess about what the result is.

It can vary all over the map. If it was hot-rolled 1018 steel or basic
structural steel, such as A36, chances are it had little or no effect.
Cold-rolled, it depends, but you weakened it somewhat. Other steel, it
depends more. Music wire or 1070 heat-treated, you've probably reduced
strength by 60% or even more.

The same is true for aluminum. You may even have made it stronger.
Brass, copper, etc., yield different answers. Chocolate bars, look in
your lap. d8-)

But, again, the answer is that there is no generalization that
applies.

--
Ed Huntress