Re: [CR]Campy Ti axles --- non-bike, non-magnetic content

(Example: Events)

Date: Wed, 21 Mar 2001 08:54:12 -0800 (PST)
From: "Tom Dalton" <tom_s_dalton@yahoo.com>
Subject: Re: [CR]Campy Ti axles --- non-bike, non-magnetic content
To: Bikerdaver@aol.com
Cc: classicrendezvous@bikelist.org
In-Reply-To: <9.12a131fd.27e99068@aol.com>


> Ti at ANY diameter will be stronger
> than steel. The fact that they make submarine hulls
> out of the stuff is a dead give away.

Hey, I'm no expert but... While the whole strength to weight vs. strength to volume issue is relevant here, I'll skip past it since since Mark B. seems to have it covered. All that aside, I think that it is the magnetic properties of titanium that make it suitable for submarine hulls. It has to be quite a bit harder to detect the magnetic anomaly of several hundered tons of titanium compared to a similar mass of steel. Titanium's corrosion resistance probably further supports its suitably to the application.

As a side note, I heard from a reliable source (okay, it was the guys on Car Talk, but they're reliable, right?) inert gas welding of sub hulls is carried out in a somewhat different fashion than it is for bike frames. The weld area on a bike frame is purged of oxygen by flowing argon from the welding tool. Sub hulls are welded in giant rooms full of argon by guys breathing from an outside air source. Hard to believe???

Tom "believes everything he hears on NPR" Dalton


--- Bikerdaver@aol.com wrote:


> In a message dated 3/19/01 7:39:19 PM PST,
> sachs@erols.com writes:
>
> > Just a note of caution re this particular
> excursion with "unobtanium:"
> > At an equivalent diameter, Ti will not be as
> resistant to bending as steel
> > (as I recall it).
> >
> They don't call it Titanium for nothing. Ti at ANY
> diameter will be stronger
> than steel. The fact that they make submarine hulls
> out of the stuff is a
> dead give away. Or better yet, the wing skeleton of
> a 747 is made from Ti
> tubing. You can pick up a 50 ft section with a 8
> inch diameter and wall
> thickness 1.5mm, drop it from over your head: It
> won't even ding. Try do that
> with any steel alloy of the same configurations any
> day of the week. Cheers,
> Dave Anderson
>
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