Aluminum explanations

Discuss light weight issues concerning road bikes & parts.
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Xterra Racer
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Joined: Thu Sep 11, 2003 9:10 pm
Location: Colorado

by Xterra Racer

Does anyone know a good resource that explains the differences in aluminums?? Such as 2014, 6061, 7005, ect. I'm looking to understand what the different types are and what are the advantages and disadvantages to each in relation to frames and rims.


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Posts: 1903
Joined: Sat Nov 30, 2002 4:49 am

by Cyco

The different Aluminium designations have to do with their alloying constituents. The first number is the main element i.e. 6xxx is Silicion, 7xxx is Zinc (cant rememeber what 2xxx is - maybe Copper). The rest of the numbers are the identification number given to it when the composition is lodged with people who decide these things (I should know this).

Different alloys have different properties i.e. Weldability, ductility, malleability, etc.. and as such are suited to different tasks eg 7075 high strength, good fatigue life, slightly brittle - good for cranks, ok for hubs. 2014 good strength, high fatigue life , hard to work - good for hubs, difficut to make into rims.

The T* designation is the heat treatment level, T0 - fully annealed, T4 - half hard, T6 - 3/4 hard.

For more specific alloy information try

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Joined: Fri Jun 27, 2003 8:05 pm

by nikh

Probably not much help but worth a read

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