[TheForge] Re: TheForge Digest, Vol 26, Issue 38

[Mike Porter]

Braze welding, previously called hard brazing, and spelter brazing, is a 
diffusion join similar to soldering or silver brazing, but do to the filler 
alloys used, which are known as capping or filleting alloys, takes place 
near enough to the melting temperatures of non-ferrous base materials to 
cause very deep penetration and intermingling of the filler with the parts 
being joined, so that it is often impossible to show any definite boundary 
layer between them afterward. With ferrous alloys the filler will form 
definite beads, similar to welding passes. It is therefore both a brazing 
process, because it is dependant on diffusion, but also a welding process, 
because fusion can and often does also occur.

Foidermor, der is constantly new filler alloys being intredoiced to da 
market what is confusin de issue even more, by imitatin spelter alloys at 
soiderin tempoitures, etcetera, etcetera, and like dat.
Mikey
----- Original Message ----- 
From: "Fred Zickrick" <fredz72 at cableone.net>
To: <theforge at mailman.qth.net>
Sent: Friday, March 17, 2006 6:09 PM
Subject: [TheForge] Re: TheForge Digest, Vol 26, Issue 38


At 11:37 AM 3/17/2006, you wrote:
>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.
>Roger VanHoozer


So what is braze welding which the AWS discusses
in their textbook for welding students??


Thank you,
Fred Zickrick, fredz72 at cableone.net

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