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PostPosted: Fri Sep 07, 2007 1:59 pm 
Old School Grand Master
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Joined: Tue Jul 05, 2005 3:14 pm
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Location: Warwick
"Trouble is since then anyone who wants titanium bits made up comes straight to me"

Jones - Youve just shot yerself in the foot there.... ;)


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PostPosted: Fri Sep 07, 2007 2:01 pm 
Retrobike's #1 Comedy Genius
Retrobike's #1 Comedy Genius
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Joined: Thu Jan 04, 2007 8:07 pm
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Location: Wolkenkuckucksheim
Get a magnet- if it doesn't attract, it's Aluminium.
If it shows non-positive attraction, it's Titanium.

I found this in the Alexandre Vinikourov Big Book of Metallurgy for Boys.


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PostPosted: Fri Sep 07, 2007 2:26 pm 
MacRetro rider
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Stick it in a bottle of coke, leave overnight, it it is there in the morning it's probably titanium. :)


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PostPosted: Fri Sep 07, 2007 2:26 pm 
Old School Grand Master
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These are all really useless tips. Thank you. :D


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PostPosted: Fri Sep 07, 2007 2:27 pm 
MacRetro rider
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yes but we pulled Jones out of the woodwork, I'm doing engineering drawings as we speak :wink:


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PostPosted: Fri Sep 07, 2007 2:27 pm 
Retro Guru
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Location: Sunny? Devon
The Ken wrote:
Stick it in a bottle of coke, leave overnight, it it is there in the morning it's probably titanium. :)



:lol: :lol: :lol:


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PostPosted: Fri Sep 07, 2007 2:55 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15808
Location: near cwmcarn
Jones wrote:
scant wrote:
http://www.bikepro.com/products/metals/hardness.shtml


I was assuming they didn't want to mash whatever it was to test it :lol:



hang on, your suggestion of scratching it with a nail to test surface hardness is EXACTLY the same as my bikepro test, IE different ways of testing surface hardness! except my links to industry standard tests & yours is "scratching it with a nail" :lol: :lol: :lol: :wink:

yeh I think my suggestion is a serious suggestion jez ;) it would probabily help if you told us what the part is?


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PostPosted: Fri Sep 07, 2007 2:57 pm 
Old School Grand Master
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Chainrings!


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PostPosted: Fri Sep 07, 2007 3:06 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
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Location: near cwmcarn
do you have them to hand? the ti chainrings i've used are generally much smaller side on. IE less material used, if not they;re be heavier than the alu 1s :)


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PostPosted: Fri Sep 07, 2007 3:36 pm 
Old School Grand Master
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Not yet - they are on their way...


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