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Looking for link: Frame materials(6 posts)

Looking for link: Frame materialsBulldozer
Aug 29, 2003 8:33 AM
Do anyone know of a good website that compares the different metals used in road frames? I'm getting entirely lost in the sea of letters and numbers that make up all of the names of the different aluminiums especially.
re: Looking for link: Frame materialsgtx
Aug 29, 2003 9:03 AM
http://www.sheldonbrown.com/frame-materials.html
re: Looking for link: Frame materialsmldphish11
Aug 29, 2003 10:23 AM
calfee design's website has this 13 page article describing pro's and con's of each frame material. hope it's useful. also, check out some of there sweet-a$s rigs while your there. http://www.calfeedesign.com/Calfee_TWP.pdf
-matt
re: Looking for link: Frame materialsterry b
Aug 29, 2003 11:11 AM
http://www.sanobike.com/tubesets.htm refers to specific tubing products and some of their attributes

http://www.strongframes.com/frames/tubing/ similar information

http://www.columbustubi.com/english/index.htm talks about their products with some in-depth descriptions of alloys

http://www.dedacciai.com/ ditto

http://www.eastonbike.com/TECH_FAQ/tech_techbull.html might be more than you'd ever want to know

http://www.reynolds-cycle.com/internet/english/tech/tech.htm ditto
The mother lode...Bulldozer
Aug 29, 2003 11:27 AM
I've been looking for a Columbus link for two days. Muchas gracias!!!
Easton Grain Refinement diagram = a load of BS.Synchronicity
Aug 31, 2003 5:21 PM
Very nice bunch of links, BUT:

Firstly, they (Easton) state in a few articles that their proprietry cold-working process refines the grain. Yes the grains get smaller as a metal is cold worked, but it ISN'T exclusive to Eastons processes.

Here is the article:
http://www.eastonbike.com/downloadable_files/tech_sheets/TaperWall%20Tech.pdf

Also the diagram shows (if anything) a bunch of atoms, not grains. Grains don't look like that. /Grains/ are areas where the atoms are mostly in alignment, as in a piece of galvanised (zinc plated) steel sheet. These grain areas adjoin eachother. They don't sit in space like that, separated from eachother.

Furthermore, cold working a metal (i.e. whacking it with what is essentially a big mallet) doesn't "align the grains", at least not in the way as they state in the diagram. If anything it introduces MORE dislocations into the metal. So cold working introduces MORE DISORDER in the atomic lattice. That is why a cold-worked metal is stronger: a crack needs more energy to pass through the many billions of dislocations.

What cold working DOES DO is orient the grains with respect to the forging shape. So they grains look like they "flow" around a particular shape, such as the spider of a crankset. Whereas machining it from a sold block of metal cuts directly into the grains.

Honestly, I'm frankly shocked that that stupid diagram has made it that far. Obviously there are too many people at Easton. Some stupid graphic-designer/desktop-publisher has take it upon himself to draw a diagram of grains.
The fundamental idea of coldworking & grain refinement was lost when they put the article together. Why didn't someone double-check the diagram? Either that or they don't know what they're doing.

WHERE ARE ALL THE GRAIN BOUNDARIES, EASTON??!!