[s-cars] A bit off topic but,
Good article on aluminum strength at elevated temperatures,
brake hubs, rocker arms etc...
Joe Pizzimenti
joe.pizzimenti at gmail.com
Tue Mar 1 12:47:20 EST 2005
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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