Framebuilders - copper-beryllium?
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08-26-08, 12:06 AM
Is it true people are making frames outta this stuff? the other day someone said there is a builder somewhere making frames with it :twitchy:
is there any truth to this?
08-26-08, 12:31 AM
It is very expensive of a material to make. If you're ponying up for a $30,000 frame...ummm...why not get a fleet of Ti bikes instead? Oh yeah, handling beryllium will kill you.
IIRC in the early 1990s there were a few beryllium frames coming out of Russia. As noted above, beryllium is extremely toxic and difficult to work with.
08-26-08, 01:59 AM
I know its super harmful... thats why i was so shocked to hear it, to be honest its not that great
08-26-08, 09:44 AM
...Oh yeah, handling beryllium will kill you.
that's what I was thinking. In the Navy we had to take all these precautions when we had to repair gear that had beryllium alloys in it.
08-26-08, 11:39 AM
"the price for an ounce of Be is about $300!! This translates into $19, 200 for one pound of material!!"
Uh, no, that translates into $4,800 for one pound of material.
Beryllium-copper is a heat-treatable alloy used for non-sparking tools and stuff, but would not be especially useful in a bicycle frame; it is mostly copper and is not light. The article referenced is referring to beryllium or a mainly-beryllium alloy.
They make golf clubs out of it and hammers. Not all that expensive in the Be Cu stuff. I once reground a club before I knew it was a bad thing to do.
08-26-08, 04:23 PM
bikes are made out of beryllium, not the copper type, they usually take sheet metal and form it into a tube and weld it, then fabricate a frame, beryllium is very high on the element chart showing its weight.
08-26-08, 09:09 PM
Copper-beryllium is like 1.6% beryllium. What it does is gives you a very tough, dense and heavy metal. Good for hammers & golf-clubs, but not exactly great strength-to-weight ratio for bike-tubing.
Beryllium-copper (http://www.matweb.com/search/DataSheet.aspx?MatGUID=9b159fd901454263b8a90c22a66f1988)= 0.298 lb/in³, 32-170kpsi yield-strength, 70-117kpsi ultimate-strength
Lescalloy - high-strength alloy-steel (http://www.matweb.com/search/DataSheet.aspx?MatGUID=7df1b0658d9846a1822ea4ef0aea677f)= 0.281 lb/in³, 185kpsi yield-strength, 220kpsi yield-strength
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