[TheForge] forge brazing

[David E. Smucker]

As my father used to say.  "Cleanliness is next to godliness except when it 
comes to soldering and then cleanliness comes first."

Dave Smucker
----- Original Message ----- 
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
To: <theforge at mailman.qth.net>
Sent: Monday, January 31, 2005 8:36 AM
Subject: Re: [TheForge] forge brazing


> For any brazing question, see the Handy & Harmon Brazing Book.
>
> Pure copper melts a good deal higher than brazing alloys.  This may
> make it more difficult to braze with.  When it melts, it flows as a
> liquid (as do eutectic alloys).  If you want these properties, then it's
> fine.  In some cases a wide melting range is better.  The suspended
> solids ( at mid-range temperatures) can help fill larger gaps.
>
> Usually, no fancy flux is needed for brazing.  The point of the flux is
> to remove the oxides present and to prevent formation of additional
> oxides.  Typically, fluxes are chosen to match the brazing temperature.
> Sometimes special fluxes are needed for special problems, like flurite
> for aluminum.  Be careful with these, they can be highly toxic.
>
> With brazing and soldering, clean is everything.  Remove all crud and
> as much oxide as possible either mechanically or by pickling.  Nothing
> spoils a brazed or soldered joint faster than bad surface prep.
>
> Bruce
> NJ
>
>>>> f_faller at yahoo.com 1/28/2005 10:00:42 PM >>>
> I need some simple suggestions on forge brazing. What
> is a good flux? What is a good brazing material? Can I
> use copper? What sort of surface preparation do I
> need?
>
> Any suggestions or tricks would be helpful.
>
> Frederick Faller
>
> =====
> Frederick W. Faller
> Shiloh Forge Ironware http://users.rcn.com/ffaller/SFI_web.htm
> www.immerland.com
>
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