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View Full Version : Re: Titanium or carbon


Tim Axtelle
July 16th 03, 12:22 AM
Jasper Janssen > wrote in message >...
> On 11 Jun 2003 17:32:42 -0700, (Chalo) wrote:
>
> >Since both of those frame materials are offered because they are
> >exotic (and not because of any significant superiority compared to
> >quality steel or aluminum), then the better one is the one that turns
> >you on more. That's the only noticeable advantage either material
> >possesses over the cheaper alternatives anyway.
>
> Ti has the big advantage of not needing paint and thus looking great.
>
> Jasper


The other big advantage to Ti over carbon is the metallic 'ping' sound
that the cable spacers make when you go over a bump in the road. I
love that. Probably just me.

Dr. Rev. Chuck, M.D. P.A.
July 16th 03, 05:42 AM
Tim Axtelle wrote:
>
> Jasper Janssen > wrote in message >...
> > On 11 Jun 2003 17:32:42 -0700, (Chalo) wrote:
> >
> > >Since both of those frame materials are offered because they are
> > >exotic (and not because of any significant superiority compared to
> > >quality steel or aluminum), then the better one is the one that turns
> > >you on more. That's the only noticeable advantage either material
> > >possesses over the cheaper alternatives anyway.
> >
> > Ti has the big advantage of not needing paint and thus looking great.
> >
> > Jasper
>
> The other big advantage to Ti over carbon is the metallic 'ping' sound
> that the cable spacers make when you go over a bump in the road. I
> love that. Probably just me.

Ti has nearly the same ductility as steel. Carbon snaps.

Dr Engelbert Buxbaum
July 18th 03, 08:50 AM
Dr. Rev. Chuck, M.D. P.A. wrote:

> Ti has nearly the same ductility as steel. Carbon snaps.

That depends on temperature. When I was caving in England, using Single
Rope Technique, I was warned against using titanium carabines in my
equipment. There had actually been accidents because they can suddenly
shatter at the low temperatures in caves (about 4 degrees C). We always
used aluminium crabs to hang our lives on.

Leonard Migliore
July 19th 03, 04:16 AM
In article >, Dr Engelbert Buxbaum
> wrote:

> Dr. Rev. Chuck, M.D. P.A. wrote:
>
> > Ti has nearly the same ductility as steel. Carbon snaps.
>
> That depends on temperature. When I was caving in England, using Single
> Rope Technique, I was warned against using titanium carabines in my
> equipment. There had actually been accidents because they can suddenly
> shatter at the low temperatures in caves (about 4 degrees C). We always
> used aluminium crabs to hang our lives on.

If titanium cracks at 4 degrees C, why aren't the jet engine fans
exploding off of more airplanes? They see air a lot colder than that.

David Kerber
July 19th 03, 02:14 PM
In article >, says...
> In article >, Dr Engelbert Buxbaum
> > wrote:
>
> > Dr. Rev. Chuck, M.D. P.A. wrote:
> >
> > > Ti has nearly the same ductility as steel. Carbon snaps.
> >
> > That depends on temperature. When I was caving in England, using Single
> > Rope Technique, I was warned against using titanium carabines in my
> > equipment. There had actually been accidents because they can suddenly
> > shatter at the low temperatures in caves (about 4 degrees C). We always
> > used aluminium crabs to hang our lives on.
>
> If titanium cracks at 4 degrees C, why aren't the jet engine fans
> exploding off of more airplanes? They see air a lot colder than that.

Different alloys different heat treatments, because of different design
criteria.



--
Dave Kerber
Fight spam: remove the ns_ from the return address before replying!

REAL programmers write self-modifying code.

Bernie
July 20th 03, 04:50 AM
David Kerber wrote:

> In article >, says...
> > In article >, Dr Engelbert Buxbaum
> > > wrote:
> >
> > > Dr. Rev. Chuck, M.D. P.A. wrote:
> > >
> > > > Ti has nearly the same ductility as steel. Carbon snaps.
> > >
> > > That depends on temperature. When I was caving in England, using Single
> > > Rope Technique, I was warned against using titanium carabines in my
> > > equipment. There had actually been accidents because they can suddenly
> > > shatter at the low temperatures in caves (about 4 degrees C). We always
> > > used aluminium crabs to hang our lives on.
> >
> > If titanium cracks at 4 degrees C, why aren't the jet engine fans
> > exploding off of more airplanes? They see air a lot colder than that.
>
> Different alloys different heat treatments, because of different design
> criteria.
>

What you say has merit, but mountaineering gear - life and death equipment at
that - that gets brittle enough to break in the cold? How likely is that?
They must have a very clear warning on them somewhere. Didn't notice any
of those the last time I was at MEC.

Bernie

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