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Subject:	Re: Solder melt energy coefficient
From:	Dave Hillman <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Tue, 8 Oct 2002 07:47:45 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (65 lines)

Hi Ed! The Specific Heat Capacity of Sn60/Pb40 is 150 J Kg(superscript: -1)
K(superscript: -1) and the its Latent Heat of Fusion is 37 KJ Kg
(superscript: -1). You should be able to make your calculation using these
values plus don't forget to add into the equation the solderpot specific
heat contribution. Good Luck.

Dave Hillman
Rockwell Collins
[log in to unmask]





Ed Popielarski <[log in to unmask]>@ipc.org> on 10/07/2002 10:56:25 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
       to Ed Popielarski <[log in to unmask]>

Sent by:    TechNet <[log in to unmask]>


To:    [log in to unmask]
cc:

Subject:    [TN] Solder melt energy coefficient



Hi all,

Does anyone know the energy (BTU, Watts, HP, etc.)  required to raise some
amount of SN63 solder (lbs, kg, etc.) some  thermal unit (deg. F or C) in
an amount of time (min, hours, etc.)? Now to make  the question even more
"anal" (pardon my moonish term) how about the energy to  go through phase
transition? Have I been thinking about wave soldering too much?  Probably
so, but I need this info to determine the correct kW values to  heat an "N
lbs" pot in "X" time (a customer requirement).

Regards,

Ed Popielarski
QTA Machine
10 Mc Laren, Ste
Irvine, Ca. 92618

Phone:949-581-6601
Fax: 949-581-2448
Cel:  949-337-2578

WWW.QTA.NET



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