MTB frames

[daggavis]

Just a question regarding frame material..

 

What is the difference between 6061 and 7005 aluminium tubing?

 

 

Cheers

[Spinnekop]

944?

 

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[daggavis]

You must be an accountant!

 

 

[Spinnekop]

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[Red Zone]

They are different grades of aluminium. 6061 is softer than 7005, 7005 is however more brittle. They are manufactured differently which leads to different charactartists, both can be used in high end frames or low end - they just feel different. I think it is easier to build with 6061.

[daggavis]

so which is better bike, bike with 6061 or 7005?

[lowracer]

shamelessly cut and pasted (spoeg en plak)

 

van http://www.mtbr.com/files/data/250.html

 

The numbers are standard designations for aluminum alloys. Pure aluminum isn't the best material for many uses, most applications are for alloys. The 6000 series alloys uses silicon and magnesium to get their strenght, the 7000 series uses zinc. There are other series, with different additions. In addition to the additional elements, much of the material strength is controlled by post forming treatments. A combination of cold working, and heat treatments, they let you make a balance between a number of properties, such as strength, brittleness, and even corrosion resistance. These are designated by a T number following the alloy designation. (T4,T6,T10, etc)

 

 

there are some more info if you click the link

 

[Canaris]

depends on what ride you want

[lowracer]

so which is better bike' date=' bike with 6061 or 7005?[/quote']

 

depends on the application and heat-treatment

[shearder]

as lowracer said, heat treatment. Welding 6061 will cause it to lose half it's strength and then after welding you will need to get it heat treated again to regain it's strength and regain its integrity. This is why i stay away from using aluminium in projects and rather use steel. I believe it is also quite expensive to get the heat treatment done propoerly. Not sure how much though.

 

But it's up to you in the end.