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<div>Wally,</div>
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<div>Aluminium is structurally fine to use for the plate, provided
that its strut section sizes are increased slightly to allow for the
lower yield point of Aluminium compared to cast iron.</div>
<div><br></div>
<div>However, the big problem with using it has to do with tuning
stability. Aluminium has a much higher thermal expansion rate than
does SAE 1085 piano wire (by a factor of around 3 from memory). So the
tuning stability will be, all other factors being equal,
inferior.</div>
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<div>Ron Overs.</div>
<div><br></div>
<blockquote type="cite" cite>. . . I didn't notice any particular
problems as a result of this being an aluminum plate, so wondered why
the practice didn't continue. Anyone informed as to the history of the
aluminum piano plate?</blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite> </blockquote>
<blockquote type="cite" cite><br>
<br>
Wallace T. Scherer, Piano Technician, Music Educator<br>
Piano Tuning & Repairs, Piano Lessons, Edwards String Covers<br>
P.O. Box 4121, Lantana, Florida, 33465<br>
Phone: 561-432-4121<br>
Web page: http://www.angelfire.com/biz6/afinetune</blockquote>
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