[TheForge] soldering v brazing v welding (fyi)

[Mike Porter]

Aubrey,
No, the only official distinction is the liquidous temperature, but they do 
go into other differences, such as inter-penetration, and aggression with 
different alloys. If you have a specific question, I have been making 
something of a study on the subject of joining, since that is what book two 
is all about.

At least one other fella round here knows a bit too, 'cause I saw him trying 
to awaken interest in phase diagrams; no doubt he'll keep me honest :) Not 
that phase diagrams aren't interesting, if you're an engineer. Its kind of 
like math, you know math teachers are sooo lonely. I can make people's eyes 
role up in their heads, but only with burner talk--we all go a little crazy 
sometimes :-)
Mikey
----- Original Message ----- 
From: "Washington, Aubrey O." <awashington at ou.edu>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, March 17, 2006 12:01 PM
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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