I should have remembered that, where do all those brain cells go. Aside
from making knives, a million years ago I was also a nuclear reactor
operator (like Homer Simpson) and the endless training included metallurgy
so we could understand the fundamentals behind temperature and pressure
limitations for pipes and pressure vessels. Nil ductility temperatures,
heat flux, charpy v-notch tests, the chart of the nuclides, the decay
chain of I131, it's all coming back to me--must...get...air.
-----Original Message-----
From: Chasgee@aol.com [mailto:Chasgee@aol.com]
Sent: Friday, March 29, 2002 5:38 PM
To: kaskas@earthlink.net
Cc: fot@autox.team.net
Subject: Re: flywheel bolts
Kas and all,
Actually, hardness and strength are different ways to measure the same
thing. You can actually convert a hardness value to a strength value.
Hardness testing was developed to provide a "nondestructive" method for
testing strength.
What you are really after is a bolt that exhibits high hardness/strength
with good ductility. Ductility is essentially lack of brittleness.
Inpact strength may also be important.
What ARP really does that is so special is that they use high quality
steels to make their fasteners. They also make sure that dimensions are
good and use some special shapes they have developed over the years to
help distribute load better. They also use the best heat treater in the
world for their fasteners (OK, a shameless plug for the company I work
for, Bodycote Thermal Processing).
Hope this info helped this thread.
Chuck Gee
Spitfire Racer
Metallurgical Engineer and heat treater
Blacksmith Racing
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