[s-cars] A bit off topic but, Good article on aluminum strength at elevated temperatures, brake hubs, rocker arms etc...

[Joe Pizzimenti]

So, for someone making rotor hats, for example, 2024 would be a better
material than 7075 or would 6061 be preferred?

Joe


On Tue, 1 Mar 2005 09:06:34 -0800, Trevor Frank <tfrank at symyx.com> wrote:
> 
> So this is one of my pet peeves, IMHO using the wrong alloy for the job.
> People often apply 7075 as the defacto high strength alloy, not taking
> into account what temperatures due to the way's that the alloy is
> strengthened, i.e. the strength of the alloy at temperature.  2024 is
> often an overlooked alloy, almost the strength of 7075 but much more at
> elevated temperatures.  I have seen this in many graphs but just found a
> really nice article that illustrates this issue quite clearly and show's
> how weak 7075 actually is at elevated temps for instance at 400 deg F,
> 6061 is actually stronger and stiffer, 2024 besting both of them.  So I
> suspect that most brake hubs...rocker arms...valve spring retainers
> etc...that see these temps and require high strength could benefit from
> the increase in strength or rather could benefit from knowing that the
> assumption they are gaining strength over 6061 is wrong.
> 
> http://naca.larc.nasa.gov/digidoc/report/tm/19/NACA-TM-1419.PDF
> 
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