Andrew,
I think the reference was to a metal to which an existing magnet would
be attracted, not to one exhibiting magnetic properties.  Anyway the
point is moot as has been pointed out,  it is not a valid test. Hmmm,
maybe if I magnetize my exhaust in the correct orientation the
superheated ions will disperse in a more orderly fashion in a reverse
ram-tube effect there by enhancing power, fuel economy, sexual
attraction and diminishing pollutants!!  I think I'll throw it into the
sea for a eon or two.  : >  It'll be frydaye when you get this.
On Wednesday, November 23, 2005, at 03:41  PM, Automatic digest
processor wrote:

> Date:    Wed, 23 Nov 2005 21:48:48 +1300
> From:    Andrew Grebneff <andrew.grebneff@STONEBOW.OTAGO.AC.NZ>
> Subject: Re: Exhaust Pipe Rust Prevention
>
>>  You can take a piece of 304(usually not> ferromagnetic) and beat the
>> crap out of it with a hammer and it'll
>>> become > ferromagnetic because you've changed the structure
>
> I think you'll find that a metal (or iron-bearing rock) is magnetic
> when the charged grains (crystals, when speaking about metals) are
> aligned so that the magnetic fields of each particle are aligned and
> in the same orientation. The more particles so-aligned, the more
> magnetic the whole appear. It's not that "nonmagnetic" stainless
> isn't magnetic... it's just that the particles' fields are random in
> orientation, so no overall field is displayed. Malleating or intense
> heating can alter the orientation of particles so that they increase
> in alignment; heat will do so by melting the metal, and the particles
> will tend to realign themselves while molten (this is how ocean-floor
> magnetism creates strips of like-charged basaltic rock on either side
> of the midoceanic ridge system, which can be poicked up by
> magnetometers). Malleating (pouning metal in sucha  way as to cause
> it to effectively flow (yes, solids DO flow under sufficient
> pressure, as can be seen in the Earth's mantle) probably realigns the
> field by causing the particles' fields to be altered in direction,
> rather than the particles themselves reo