[s-cars] Silly question - cryo treated rotors

[Mark Rosenkrantz]

If you look at treated metal sections under a SEM, you'll see the grain
structure is more uniform (re-aligned).

Uniformity means uniform stresses, less stress risers, and more efficient
heat dissipation.

It absolutely works when you're pushing the "envelope" of the system.  For a
street driven car, it'll have less possibility of warping and longer life,
but I'd *guess* at small margins.  It might provide a small margin against
pad deposition, but that's a stretch in my mind.

Treated rotors are a potential problem solver.  If you don't have a problem,
don't spend the extra money.  Any additional longevity won't be worth the
added expense.

Mark Rosenkrantz
An armchair brake systems expert.  =)

On Thu, Dec 3, 2009 at 5:57 PM, Robert Myers <bob at chips-ur-s.com> wrote:

> *This message was transferred with a trial version of CommuniGate(r) Pro*
>
> Yeah, I've heard all that stuff and it makes little sense to this
> chemist.  Molecular motion (required if the structures are to
> realign) slows down at lower temperatures.  The argument would favor
> heat treating not "cold treating".  But what do i know?  I guess
> that's why I first posed the question
>
> Bob
>
>
> At 05:04 PM 12/3/2009, Bares, Vittorio wrote:
> >*This message was transferred with a trial version of CommuniGate(r) Pro*
> >Treating metal via cryogenics is supposed to align the molecules.
> >Aligning the molecule improve heat dissipation. I'm not a metallurgist,
> >but seems to make sense for very high heat scenario's - I don't think
> >its worthwhile for daily drivers - except for beer conversations :)
> >
> >Vittorio -
> >-----Original Message-----
> >From: s-car-list-bounces at audifans.com
> >[mailto:s-car-list-bounces at audifans.com] On Behalf Of Robert Myers
> >Sent: Thursday, December 03, 2009 3:13 PM
> >To: quattro list; S-Car-List at Audifans.Com
> >Subject: [s-cars] Silly question - cryo treated rotors
> >
> >*This message was transferred with a trial version of CommuniGate(r)
> >Pro*
> >
> >Hi Y'all,
> >
> >I frequently see ads for cryogenically treated rotors at, of course,
> >premium prices.  Laying all the bullcrap aside is there actually any
> >added value for this treatment or is it just marketing hype?  IOW, is
> >it worth the added expense in terms of better performance or longer life
> >or...?
> >
> >Bob
> >
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