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Old January 15th 18, 12:42 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
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On 1/14/2018 5:06 PM, Jeff Liebermann wrote:
On Sun, 14 Jan 2018 14:32:16 -0500, Frank Krygowski

On 1/14/2018 2:01 PM, Jeff Liebermann wrote:
On Wed, 10 Jan 2018 02:38:48 +0100, Emanuel Berg

Take one piece of aluminium and one piece
of stainless steel and hold it in ur hand -
they must be the same size, you can feel
the weight different: aluminium is much
lighter, while stainless is much heavier.

It depends on the type of stainless steel. Exotic alloys, complex
heat treatment, and a lengthy annealing process, will produce a
stainless steel that is quite strong and suitable for bicycle frames
(and by implication, handlebars):

That's a precipitation hardening stainless steel. That's _very_ exotic

It may be a pain in the posterior to heat treat, with the steel at
480C-800C for 4 hours waiting for a precipitate to form, but methinks
it's becoming more common, available, and possibly affordable:
17-4 PH stainless (also known as UNS S17400 or SAE T-630) seems to be
available in various flavors:
for a multitude of mundane applications:
"...alloy 17-4 PH is a superb choice for structural components
of airplanes, biomedical hand tools, food processing equipment,
pulp and paper mill processing and nuclear waste processing
and storage."
The tubing is supplied as "solution treated" at moderate hardness,
which can be machined and possibly hydroformed into components. Once
that's done, a simple low temperature heat treatment (age hardening)
brings it up to full strength.

There's also 17-7 PH which seems to more appropriate for tubing:

No clue on the cost of such a 17-4 PH frame or handlebar:

"The Surge of Stainless Steel"

From the dreamy adspeak: Stainless steel's ride can be "crisper" and

Is that better than "rigid, yet compliant"?

- Frank Krygowski

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