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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 08-25-08, 11:06 PM   #1
dods1600
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copper-beryllium?

Is it true people are making frames outta this stuff? the other day someone said there is a builder somewhere making frames with it

is there any truth to this?
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Old 08-25-08, 11:31 PM   #2
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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.
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Old 08-25-08, 11:52 PM   #3
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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.
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Old 08-26-08, 12:59 AM   #4
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I know its super harmful... thats why i was so shocked to hear it, to be honest its not that great
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Old 08-26-08, 07:15 AM   #5
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http://www.mse.engin.umich.edu/inter...-bicycle-frame
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Old 08-26-08, 08:44 AM   #6
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Quote:
Originally Posted by prendrefeu View Post
...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.
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Old 08-26-08, 10:39 AM   #7
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"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.
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Old 08-26-08, 12:22 PM   #8
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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.
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Old 08-26-08, 03:23 PM   #9
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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.
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Old 08-26-08, 08:09 PM   #10
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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 = 0.298 lb/in³, 32-170kpsi yield-strength, 70-117kpsi ultimate-strength
Lescalloy - high-strength alloy-steel = 0.281 lb/in³, 185kpsi yield-strength, 220kpsi yield-strength

Last edited by DannoXYZ; 08-26-08 at 08:17 PM.
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