PSN-L Email List Message

Subject: Re: shim stock hinges
From: ChrisAtUpw@.......
Date: Thu, 16 Mar 2000 20:37:15 EST

In a message dated 16/03/00 20:55:44 GMT Standard Time, 
gjharris@............. writes:

>  Recently, I have located sources for thin beryllium copper which I
>  consider the ideal material for hinges.
>  The sample which I have is .002 thick, and has a strength of 70,000
>  psi.  By heat treating at 600 deg. F
>  for a couple hours, the strength is 150,000 psi. 
>  .......
>  In order to heat treat it, I have constructed a tiny oven of firebrick
>  which is placed on a gas range with a thermocouple sensor.
    Please do remember that Beryllium is EXTREMELY TOXIC.


    Chris Chapman

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Larry Cochrane <cochrane@..............>