According to the AS&W transcript, gray#50 is preferred because of tremendous compressive strength, and no harmonic resonance. --- Delwin D Fandrich <pianobuilders@olynet.com> wrote: > And If I haven't created enough confusion yet, I'll > toss out another one: > > Just why do we think gray iron is the best of all > possible materials to use for piano plates anyway? > What is it about gray iron that is so special? > > We say it is extremely rigid -- but it is not. It's > brittle. Is this an advantage? > > We say it has excellent internal damping > characteristics -- but is this an advantage? Why? > > Right off hand I can think of only two > characteristics that make it a particularly good > choice for piano plates: [1] It is easy to machine > and [2] it is cheap. Neither of these has anything > to do with its performance in the piano. > > Del > > > > __________________________________________________ Do You Yahoo!? Yahoo! Finance - Get real-time stock quotes http://finance.yahoo.com
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