Re: Boron safety data sheet

From: ray_harlan <rbharlan_at_comcast.net>
Date: Tue, 04 Jan 2011 16:38:03 -0000

The boron that I have now all has tungsten core. They no longer make a carbon core and did so only for .004" or larger. The weight savings for the carbon-cored material was about 30%.

I just massaged some numbers, because Leo Pilachowski was asking about it. I thought that with tungsten being almost the heaviest element, the core would have to be very tiny to have only a 30% weight penalty, but it turns out the core is somewhere near .0005". I don't know how big the carbon core was, but Leo has some literature that says it was about the same size

Ray

--- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo <tapio.linkosalo@...> wrote:
>
> On 29.12.2010 23:06, John Kagan wrote:
> > I have Boron accumulated on two types of cores: tunsten wire and carbon.
> >
> > Interestingly, I've found that I need to use two different methods to
> > "cut" them.
> >
> > The tunsten core type likes to be bent until it snaps. Squeezing it with
> > pliers does nothing. (If you have to get a boron splinter, this is
> > probably the kind you want. It holds together and comes out cleanly. It
> > also always surprises me how long the splinter ends up being - kind of
> > scary)
> >
> > The carbon core type likes to be crushed with pliers. Bending it until
> > it snaps causes it to shatter in several places, always including
> > somewhere you didn't want it to break. (Maybe this is the kind of Boron
> > splinter people have had trouble with, dunno)
>
> Which core does the boron that Ray Harlan sells have? I have used
> scissors to cut both 3 and 4 mil fibres from him: take a piece of tape,
> double it so that boron gets into the tape fold, then cut through the
> tape and the fibre. Works nice and cuts pretty easily.
>
>
>
> -Tapio-
>
Received on Tue Jan 04 2011 - 08:38:08 CET