RE: [CR]Re: Campy Ti axles --- don't call it Titanium for nothin g

http://www.alleghenytechnologies.com/titanium/pages/help/tech5.htm Note that CP Ti (which the Campy SR bolt you refer to is made out of) can be as weak as 20 ksi in yield, referred to as "Proof Stress" on this chart. That's for CP1, which isn't fair because that's probably not the grade of the SR bolt - it's probably CP3. The yield in the chart for CP3 is 55 ksi, which is just about exactly the yield of normalized 1018 steel, a plain unalloyed carbon steel commonly used in high-volume low-cost screw machine parts. I would hope Campy would use better than 1018, but giving you the benefit of the doubt, they're about the same.

Have you actually performed the somewhat fantastic test described below? I can say I've smashed (and milled, drilled, bent, tapped, reamed and hacksawed) several grades of CP and Ti alloys, for a full-time living, and have a coupla decades of steel fabrication to compare it to also. Ti is cool stuff but let's not mythologize it.

Mark Bulgier Seattle, Wa USA
> -----Original Message-----
> From: Bikerdaver@aol.com [mailto:Bikerdaver@aol.com]
> Sent: Tuesday, March 20, 2001 10:31 PM
> To: GregParker1@compuserve.com; Bikerdaver@aol.com
> Cc: 110404.153@compuserve.com; monkey37@bluemarble.net;
> chuckschmidt@earthlink.net; sachs@erols.com;
> classicrendezvous@bikelist.org
> Subject: Re: [CR]Re: Campy Ti axles --- don't call it Titanium for
> nothing
>
>
> Greg-
> I think you are missing out on something, and no matter how
> many examples I
> come up with, I think I would still be short. Instead, go get
> a campy SR rear
> deailluer hanger bolt and an NR rear derailluer hanger bolt.
> then get the
> biggest sledge hammer you can find, and using the best equal
> force you can
> muster, smash each of the bolts as hard as you can. If the SR
> Ti bolt smashes
> any how, way, or manner similar to the NR bolt, send me the
> bolts and I will
> personally send you a free NOS SR bolt and NR bolt. If the SR
> doesn't smash
> like the NR, I will take it, $100 of your funds, and you can
> keep the smashed
> steel bolt. Sound good? Let me know. Cheers,
> Dave "I told you so" Anderson