[TheForge] soldering v brazing v welding (fyi)

[Washington, Aubrey O.]

Mickey,
 
That makes the makes complete sense to me based to what I've read.  Thanks.
 
Aubrey

________________________________

From: theforge-bounces at mailman.qth.net on behalf of Mike Porter
Sent: Sat 3/18/2006 11:17 PM
To: 'Sponsored by ABANA'
Subject: RE: [TheForge] soldering v brazing v welding (fyi)



Aubrey,
In case I didn't give a definitive answer to your question before,
temperature difference, which is admittedly strictly arbitrary, is the only
line that can be drawn between soldering and brazing anymore. Everything
that separated the two categories previously is breaking down under the
onslaught of new products and processes that mimic hard brazing with
soldering alloys, and things like deliberate pre-tinning of parts meant for
brazing (special purpose parts for difficult brazing alloys and processes,
which would normally be found only in a soldering operation. Eventually,
trying to draw a line between soldering and brazing will be abandoned
altogether, and we will speak only of diffusion joining, and individual
filler alloy characteristics. No doubt the jewelers and silver smiths will
have a hearty laugh when the AWS finally gives up its pretense of precision.
Mikey

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Washington, Aubrey O.
Sent: Friday, March 17, 2006 12:02 PM
To: Sponsored by ABANA
Subject: RE: [TheForge] soldering v brazing v welding (fyi)

Mikey,
That looks like a good resource, when I get time....  Do they distinguish
between brazing and soldering in a way that is significantly different than
the 840*F melting point of the filler metal?

Aubrey (who raised the question originally)

________________________________

From: theforge-bounces at mailman.qth.net on behalf of Mike Porter
Sent: Fri 3/17/2006 1:54 PM
To: Sponsored by ABANA
Subject: Re: [TheForge] soldering v brazing v welding (fyi)



JRF
Harris (of torch equipment fame) makes a poor source for enlightenment about
joining processes (good enough source for filler alloys though). This is the
first time I've ever seen the term "coalescence" used that way. The usual
description is "metallurgical bond" and the process is called diffusion. I
would recommend you try Handy & Harmon's Brazing Book On Line if you want a
quick soldering/brazing education: http://www.brazingbook.com/
I'm afraid you have to register with them nowadays, but it is worth the few
minuets of your time. These guys actually know what they are talking about.
Mikey

----- Original Message -----
From: "Justin Fellenz" <sunironworks at yahoo.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, March 17, 2006 9:34 AM
Subject: [TheForge] soldering v brazing v welding (fyi)


> Folks,
>
> A while back there was a discussion about the definitions of soldering
> v welding v brazing, to which I added some confusion. Here's something
> that just showed up on the metalshapers list.
>
> JRF
>
>
>
> Hi Bill & Alan:
>    Just to clarify the differences of Soldering and Brazing
> http://www.jwharris.com/jwref/faq/#def gives the following definition.
> Further information is availble at the Harris site and from the
> American Welding Society website.
>
> Definitions
>
> What is the difference between soldering, brazing and welding?
>
> Soldering - The AWS defines soldering as a group of joining processes
> that produce coalescence of materials by heating them to the soldering
> temperature and by using a filler metal (solder) having a liquidus not
> exceeding 840ºF (450ºC), and below the solidus of the base metals.
>
> Brazing - Brazing joins materials by heating them in the presence of a
> filler metal having a liquidus above 840ºF (450ºC) but below the
> solidus of the base metal.
>
> Welding - In welding, fusion takes place with melting of both the base
> metal and usually a filler metal.
>
>    BTW,  Nice looking work Bill.  Thanks for sharing it with us.
>
> Roger VanHoozer
>
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