I would anneal the plates, regardless, as they have a tendency to snap in the middle if tightened off centre, by accident of course.<br><br><div class="gmail_quote">On 27 July 2011 01:25, Joseph Garrett <span dir="ltr"><<a href="mailto:joegarrett@earthlink.net">joegarrett@earthlink.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Ron said: "This will give you the numbers. Sometimes the Internet is<br>
actually good<br>
for something.<br>
<a href="http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html" target="_blank">http://www.engineeringtoolbox.com/linear-expansion-coefficients-d_95.html</a><br>
<br>
Brass expands more. So as you heat the things up, the steel screws<br>
should get looser in the brass, then tight again as everything cools.<br>
I'm not sure it's been satisfactorily determined whether the whole<br>
annealing process is worth the trouble though."<br>
<br>
Ron,<br>
Thanks. That does gives some "numbers" to the question. Not sure if the<br>
numbers tell me anything more than brass expands a lot more than steel.<G><br>
My "gut" tells me to get rid of the flanges, but IF the annealing process<br>
gives them a new life, (which they have had for 100 years now.), it would<br>
be a whole lot less hassle to keep them. Of course, I must think of the<br>
"Long Term" implications as well. Hmmm? I've seen good results with<br>
annealed brass rails. The fellow that does them has done the rails with and<br>
without the screws and plates attached. He hasn't found there to be any<br>
difference, although he did add: "so far".<G> Things to think about for<br>
sure.<br>
Joe<br>
<br>
<br>
Joe Garrett, R.P.T.<br>
Captain of the Tool Police<br>
Squares R I<br>
<br>
</blockquote></div><br><br clear="all"><br>-- <br>Bruce Browning<br>The Piano Tuner<br>