Gee, Ingemar ... you are absolutely right .. Mil-Std-810E, Method 510 has a
couple of dandy sand recipes!

Sheila @ Marconi

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ingemar Hernefjord
(EMW)
Sent: Friday, October 29, 1999 2:56 AM
To: [log in to unmask]
Subject: Re: [TN] sand-man


Where on this planet do you have Al203 storms? I guess sand is a complicated
mixture of many particles, not only Si0. Don't you think there is a MIL-STD
that tells all about the sand requirement? /Ingemar



For anyone who would like a diversion from the assembly processes, I have a
different question.

My Army customer is simulating field testing of a weapon system to check the
abrasion resistance of some treated metal surfaces (tungsten carbide) that
rub together during flight.  The 'sand' that they are using to contaminate
these areas is aluminum oxide.  Needless to say, excessive scoring is
observed on the metal faces.  My contention is that sand is primarily
quartz, or silicon dioxide, which is softer than the Al2O3, and the system
is being over-tested.

Anyone have a notion of the acceptable sand type used in environmental
tests?

Thanks

Ralph Vaughan
Boeing-Fleming

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