[modeleng] Re: Fusible Plugs
- From: "alan stepney" <alan@xxxxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 5 Apr 2006 07:52:34 +0100
It is usually an alloy of tin + lead plus whatever.
Tubal Cain lists several alloys with their melting points in his Model
Engineers handboook.
I have always used 60:40 tin/lead, the ordinary electricians solder (that
which is 64:36 is OK), as that melts at a temperature which equates to
around 150psi, and has a very limited range between solidus and liquidus.
(it melts suddenly, which is what one needs.)
I believe I am correct in saying that Australian rules require straight
lead, which melts at a much higher temperature.
Alan
----- Original Message -----
From: "Jon Mottershaw" <j.mottershaw@xxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, April 05, 2006 4:02 AM
Subject: [modeleng] Fusible Plugs
I have a question about fusibleplugs commonly found in the crown of boilers
say 5" gauge. What is the fusible material? Is it soft solder, comsol or
something similar or is it another alloy. I was just wondering what the
melting point would typically be relative to the temperature of the water
over the crown. I ve got one fitted in my boiler and know nothing about it.
Jon
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