What about the Cu/Ni alloy Dave mentioned? Any experiences with this?
I have a set of lines purchased at Moss on sale a year or so ago. They were
made by this outfit:
http://www.automec.co.uk/
They have quite a bit of data and claim to be used on Aston-Martins, among
others. I got some burst pressure numbers from them and the material appears
to be comparable to steel in strength.
I know some swear by stainless steel, but isn't stainless somewhat brittle?
bs
********************************************
Bob Spidell San Jose, CA bspidell@pacbell.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
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>
> ----- Original Message -----
> From: "M.E. & E.A. Driver" <edriver@sasktel.net>
> To: <rusd@velocitus.net>
> Cc: "John Miller" <healeys@n4vu.com>; <healeys@autox.team.net>
> Sent: Sunday, July 04, 2004 1:22 PM
> Subject: Re: Smitty Problem
>
>
> > Hi Dave
> >
> > Thanks for the additional thoughts! It is interesting to note that
> > most provinces in Canada exclude copper (fuel, brake and clutch) lines
> > from their vehicle safety codes. It is true that some folks will only
> > use their "antique or vintage" cars for short periods and may
> > succumb to the "appropriate appearance" theory but one's safety
> > should rate high.
> >
> > Kind regards
> > Ed
> >
> >
> >
> > Dave & Marlene wrote:
> >
> > > Hi Ed,
> > >
> > > Not sure, but I think you are saying that pure copper is still being
> > > sold for brake lines. Since some cars had this material originally, it
> > > may be that some are willing to accept it's shortcomings in the interest
> > > of originality. Copper just has too many failures due to work hardening/
> > > fatigue cracking to be safe for fuel or brake lines. Most of the brake
> > > line failures are right at the flare junction which is subject to
> > > considerable pressure expansion stress cycling. I discovered this 50
> > > years ago, as did the US auto industry.
> > >
> > > We may be missing the fact that many people have gotten away with using
> > > copper. It does usually require long usage before failure, but there is
> > > no way to know ahead of time when it is about to fail. This doesn't mean
> > > that it is a safe thing to do. The failure will be sudden. I do not know
> > > of any USA racing orginizations that allow copper & no present car
> > > manufacturers use it for the stated reason.
> > >
> > > The UK industries have not been particularly noted for updating things
> > > that don't work well. Especially the small industries.
> > >
> > > Dave Russell
> > >
> > > M.E. & E.A. Driver wrote:
> > >
> > >> Hi Dave
> > >>
> > >> This thread peaked my curiosity. Like you and John I'm in favour
> > >> of the soft steel brake line but I note with interest in two of many
> > >> catalogues I have from the UK that copper tubing 3/16 to 5/16's
> > >> plus the nickel/copper alloy are still being sold for Morgans by a
> > >> Morgan
> > >> outlet while in a generalist catalogue the same is offered. I wonder
> > >> if we are missing something?
> > >>
> > >> Kind regards
> > >> Ed
> > >> Saskatoon, Saskatchewan
> > >> www.vintage-sportscar-touring.ca
> > >> '65 BJ8 '89 Morgan 4/4
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