Simon,
Just heat to cherry red and quench it in water.
Kees Oudesluijs
Simon Lachlan schreef:
> I need a copper washer. So, I've got a box of new ones of various sizes. All
> the wrong sizes.
> I've got a box of sundry old flat washers amongst which is an old copper
> washer of the right size. But it's old and has presumably ceased being soft
> and malleable.
> I'm not even sure that I can even spell "annealing" at this time of night,
> but isn't it the process by which one applies heat to restore metal's
> previous malleability? Do I heat it cherry red and then quench it in water
> or is it oil or what?
>
> It's a lot to ask for one copper washer, but a)my daughter* pinches my daily
> tintop to go to work so I can't go and buy one and b) I like to know these
> things.
> *If she can't use my car, she can't earn enough to buy her own car! I'm
> going to pay half, but she's got to learn!
> Simon
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