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<DIV><FONT face=Arial size=2>A potential problem with (austenitic) =
Stainless is
that there is a galvanic reaction with the carbon steel music =
wire. The
stainless eventually will corrode to some degree especially at/near the =
string
termination point..</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Mark Ultsch</FONT></DIV>
<DIV><FONT face=Arial size=2>Madison</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>
<A title=sjfujan@gmail.com href="mailto:sjfujan@gmail.com">Steve =
Fujan</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=deanmay@pianorebuilders.com
=
href="mailto:deanmay@pianorebuilders.com">deanmay@pianorebuilders.com</=
A> ; <A
title=pianotech@ptg.org =
href="mailto:pianotech@ptg.org">Pianotech</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, December 02, 2005 =
11:25
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Bridge Pins, was =
Bridge
Capping Materials: Ebony?</DIV>
<DIV><BR></DIV>
<DIV>Hardened stainless steel gets my vote. Not only is it =
harder (hence
more wear resistant), it is also considerably stiffer than =
titanium. The
more flexible titanium would bend more right where the pin enters the =
wood
causing higher stress right where you don't want it. The =
stainless steel
would spread the force over greater depth into the bridge. </DIV>
<DIV> </DIV>
<DIV>Plus hardened stainless in these small diameters should be =
relatively
easy to make, hence cheaper, er.. less expensive than =
titanium.</DIV>
<DIV> </DIV>
<DIV>Steve Fujan (BSME, MSME, PE)</DIV>
<DIV><A
=
href="http://www.fujanproducts.com">www.fujanproducts.com</A><BR><BR>&n=
bsp;</DIV>
<DIV><SPAN class=gmail_quote>On 12/2/05, <B =
class=gmail_sendername>Dean
May</B> <<A
=
href="mailto:deanmay@pianorebuilders.com">deanmay@pianorebuilders.com</=
A>>
wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: =
#ccc 1px solid">>>In
other words, the smaller the hardness number the harder the
steel.<BR><BR>Ooops. That's backwards. A softer material will have a =
bigger
diameter <BR>dent and a smaller hardness number. A harder material =
will have
a<BR>smaller dent and a bigger hardness number.<BR><BR>I am suspect =
of the
numbers you are quoting, Ron. The little research<BR>I'm doing shows =
Vickers
hardness of mild steel at 140, Hardened steel at <BR>900, and =
titanium at
970.<BR><BR>Then on an ask the experts site someone asked the =
hardness
ranking of<BR>various metals. Here is the answer:<BR><BR>In General- =
and I
have to qualify that by saying I'm considering the <BR>metals to be =
in the
annealed condition, the aluminum is 1100 alloy, the<BR>T6 (not =
annealed, but
age hardened) aluminum is a 2000 or 7000 series<BR>alloy, and the =
titanium
is 6Al-4V alloy rather than the commercially<BR>pure stuff (6-4 is a =
lot
more common than CP)- the order would be<BR>aluminum, brass, bronze, =
T6
aluminum, mild steel, stainless steel, and<BR>titanium. If the =
metals are in
their hardest conditions, from heat<BR>treating or cold work, the =
order
would be aluminum, brass, T6 aluminum, <BR>bronze, titanium, mild =
steel, and
stainless steel (cutlery grades).<BR>(<A
=
href="http://experts.about.com/q/2280/1021526.htm">http://experts.about=
.com/q/2280/1021526.htm</A>)<BR><BR><BR><BR><BR><BR><BR>Dean<BR>Dean
=
May &nbs=
p;
cell 812.239.3359<BR>PianoRebuilders.com =
812.235.5272<BR>Terre
Haute IN 47802<BR><BR><BR>-----Original =
Message-----<BR>From:
Dean May [mailto:<A
=
href="mailto:deanmay@pianorebuilders.com">deanmay@pianorebuilders.com</=
A>]<BR>Sent:
Friday, December 02, 2005 8:29 PM<BR>To: 'Pianotech'<BR>Subject: RE: =
Bridge
Pins, was Bridge Capping Materials: Ebony?<BR><BR>Hardness in steel =
is
tested by machines that try to put a dent in it.<BR>The bigger the =
dent, the
softer the steel. The hardness number given is <BR>inversely =
proportional to
the diameter of the dent left in the steel.<BR><BR>Check out <A
=
href="http://www.gordonengland.co.uk/hardness/vickers.htm">http://www.g=
ordonengland.co.uk/hardness/vickers.htm</A><BR><BR>Dean<BR>Dean
=
May &nbs=
p;
cell 812.239.3359<BR>PianoRebuilders.com =
812.235.5272<BR>Terre
Haute IN 47802<BR><BR><BR>-----Original =
Message-----<BR>From: <A
=
href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</A>
[mailto:<A
=
href="mailto:pianotech-bounces@ptg.org">pianotech-bounces@ptg.org</A>] =
On<BR>Behalf Of Ron Nossaman<BR>Sent: Friday, December 02, 2005 5:41 =
PM<BR>To: Pianotech<BR>Subject: Re: Bridge Pins, was Bridge Capping
Materials: Ebony? <BR><BR><BR>> Titanium probably does resist =
grooving
better that what is<BR>> usually used for bridge pins.<BR><BR>I =
find a
Vickers hardness of 60 for titanium, and 98 for mild steel.<BR>Why =
would
titanium "probably" resist grooving better when it's a <BR>softer
material?<BR><BR><BR>> I've thought about stainless, is =
it<BR>> harder
than what we usually use? Any other improvements to
consider?<BR><BR>Go here.<BR><A
=
href="http://www.matweb.com/search/search.asp">http://www.matweb.com/se=
arch/search.asp
</A><BR>Prospect to your heart's content.<BR><BR>Ron
N<BR>_______________________________________________<BR>pianotech =
list info:
<A
=
href="https://www.moypiano.com/resources/#archives">http://www.ptg.org=
/mailman/listinfo/pianotech
=
</A><BR><BR><BR><BR>_______________________________________________<BR>pi=
anotech
list info: <A
=
href="https://www.moypiano.com/resources/#archives">http://www.ptg.org=
/mailman/listinfo/pianotech</A><BR></BLOCKQUOTE></DIV><BR></BLOCKQUOTE></=
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