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Joined: May 2008
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Silver solder is a soft solder- difference is in the flux--


When The Man In Black Comes Around- Rev: 6-8
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Steve,

I have a 12ga Crass model with the same issue. PM me please.

John

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That is not correct Francis. Silver solder is hard solder,melting at 1200 or so degrees while soft solder melts at below 400 degrees. They do use different fluxes but the main difference is the alloy, it's strength and the temperature it flows at. I would have thought you knew that.


http://www.bertramandco.com/

ACGG Professional metalsmith, firearms import services.
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Runs With the Mouth, try soft soldering an exhaust manifold, but you knew that, you were just toying with us.


David


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Actually Silver solder is a soft solder (you can buy it at any HW store), that contains a small amount of Silver (2% Ag + Sn,Bi,Cu...) and melts around 440F.
Silver brazing alloys contain a lot more Silver (like 72% Ag, 28 %Cu) and melts at a significantly higher Temp possibly up to 1600F.
It's a lot stronger, and a lot more expensive.

Best regards,
WC-

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The silver solder that we were talking about for extension ribs and manifolds is not purchased at your normal hardware store. This stuff is sold by the Troy ounce and is expensive.

I use it also for fixing band saw blades when they break, and a regular propane torch will not melt it, Mapp will but it takes awhile.


David


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I use silver solder on ribs and lumps, I use the hard type for making band saw blades. Simply file tapers on the end of the blade, using c clamps I align and spring load the ends, slip in a piece of silver solder and borax flux and heat with my propane torch. Same name but a much different product. By the way the small amount of metal in the blade allows a common torch, after cleaning I like to give the joint a quick temper, blade last much longer.

bill

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Either Hard or soft solders may contain some Silver. in all the machine shops I worked in over the years "Silver Solder" was used to refer to the Hard variety. This solder melts at temperatures at least twice, & generally more ,than soft solders. It is generally though a lower temperature than Brazing. A favorite in the shop I spent the most time in was known as Ezy-Flow 45 which melted at around 1145░F.


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There are many variations of silver bearing solders/brazing metals. The melting temperatures are as varied as the alloys.

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