RE: C170 Copper - Beryllium Copper Alloy

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Colin Dancer" <Colin.Dancer@xxxxxxxxxxxxxxxxxx>

I think the jury is leaning towards chronic disease after inhalation of
even small amounts of Cu/Be alloys (so grinding is a particular worry).
The issue seems to be that typical onset is years after exposure, with
some people being much more susceptible than others, and in those who
are susceptible even very small amount causing disease.

Two interesting articles at

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&lis
t_uids=10880154&dopt=Abstract

And

http://www.eh.doe.gov/be/docs/berule.pdf

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: 10 October 2005 00:10
To: tesla@xxxxxxxxxx
Subject: Re: C170 Copper - Beryllium Copper Alloy

Original poster: "Dan" <DUllfig@xxxxxxxxxxxxx>

Don't you mean beryllium in its pure form? In aerospace we machine
beryllium copper al the time... It's alloyed in the copper, and not that
much, for that matter. It's the only way to make copper springy.
Finger stock is made of beryllium copper.

Dan

----- Original Message -----
From: <mailto:tesla@xxxxxxxxxx>Tesla list
To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
Sent: Sunday, October 09, 2005 1:09 PM
Subject: Re: C170 Copper - Beryllium Copper Alloy

Original poster: robert heidlebaugh
<<mailto:rheidlebaugh@xxxxxxxxxxxxxx>rheidlebaugh@xxxxxxxxxxxxxx>

Cameron. Beryllium is toxic to human tissue in all forms, Only the
crystal oxide is stable enough to be in contact with skin with out
causing a cancerous ulcer. in the lungs it is fatal. I recommend not
using it and never grind it with out protection. Use a protective mark.
     Robert   H
--


  > From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
  > Date: Sat, 01 Oct 2005 07:30:14 -0600
  > To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
  > Subject: C170 Copper - Beryllium Copper Alloy
  > Resent-From: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
  > Resent-Date: Sat,  1 Oct 2005 07:30:17 -0600 (MDT)
  >
  > Original poster: "Cameron B. Prince"
<<mailto:cplists@xxxxxxxxxx>cplists@xxxxxxxxxx>
  >
  > Hey guys,
  >
  > As some of you will recall, I built my large coil's primary from
bronze
  > weather-stripping based on Terry Blake's design. I'm noticing the
issues
  > that several list members warned me about. The extra resistance of
the
  > bronze is causing it to get rather hot. This is in turn causing the
foam
  > tape used as a winding spacer to melt, not to mention the energy
being lost
  > to it.
  >
  > I ordered some copper ribbon to replace the bronze but when I
received it, I
  > noticed it had a gold color similar to the bronze I already had. I
called
  > the seller and asked about it and he told me that it was actually an
alloy
  > known as C170 copper which is a Beryllium Copper Alloy. He offered
to allow
  > me to return it if needed.
  >
  > What do you think about this alloy? Anyone using it? Should I return
it and
  > look for 100% copper?
  >
  > Thanks,
  > Cameron
  >
  >