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Old 11-28-2018, 01:23 PM
crystallographic crystallographic is offline
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Join Date: Dec 2010
Location: Western Sierra Nevadas, Badger Hill, CA
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Originally Posted by RockHillWill View Post
I'm going out on a limb here, but this is what I took from the displays and training at Kent's recent visit. Because of the silver appearance and content of the three alloys and their melting temperatures that he demonstrated, and the choice to use 850 degrees F. as the deciding factor, I am choosing to describe one of his alloys as ''Silver Soldering' and the other two as 'Silver Brazing'.


Will, the alloy is our Aero Braze for aluminum, melts at 1160 - but will do 6061... and 1100, 1050, 2024, 3003, 3005, 6153, 6061, 6063 ... but no 5000 because of the magnesium alloyed within.


The first picture I incorrectly labeled in an earlier post as Silver Brazing as I did not witness this demonstration first hand. It is Kents filler rod #ABS-0063 and has a melting point 780 deg.F., and is non corrosive flux cored. It is primarily used to join most common aluminum alloys (with the exception of 5005 & 5052.) Photos on Kents website indicates that it can also be used for copper &/or brass. I consider this to be Silver Soldering.
It is the braze, above, and I did fasten the 3003 overlay patch onto the 6061 turbo intake tube with it (below) - instead of fitting a flush patch, butt welding it, and then reaching in to dress and planish out the butt weld. Just another way to patch an engine part, under the hood.


Attachment 50191


The second picture is the only one I took of the demo on using Kent's ABS-0229 non corrosive flux cored filler rod. It has a melting point of 1160-1180 deg.F. In the photo, Kent is adding a simple cover patch to an aluminum air intake to better display the tinning technic that he prefers. Here he is using a piece of 3003H14, but his website indicates that this filler rod can be used for adding several alloys of fittings to aircraft tanks. Yes, see above.

Attachment 50192



This third set of pictures is showing Kent tinning and adding an exterior patch to a steel turbo inlet tube using his ABS-0064 flux coated filler rod. It's melting temperature is 1020 deg.F., and can be used for steel, stainless, copper, brass, silver, gold and German silver. This filler rod has a 55% silver content. As with the other filler rods mentioned, Kent strongly advises cleaning the surface with a stainless steel brush or sandpaper and welding with a 'soft' flame.
Yes, I used a stainless overlay patch for repairing this plated steel hydraulic tube that had a cable chafe through it. Yes, welding is an option but not for this because of "weld fire-scale" which would require sandblasting and repeated washing for return to use. My years of doing hydraulic repairs for the local, and very rural, earth movers has given me a proven success rate. The low temps and very high strength of this silver braze make it the ideal choice - since 1973, in fact.



I don't feel that I have a good grasp on what other materials might be used to attach with using these rods, and perhaps Kent himself can add to that current vision.

Thank you, Will. It was a big joy for me to be with your group for this workshop.
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"All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919.
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