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Water Block Design / Construction Building your own block? Need info on designing one? Heres where to do it

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Old 02-01-2006, 11:47 AM   #1
JamesAvery22
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Default what silver-solder to buy and where?

I want to build a VRM block and was planning on trying the oven method to put it together. Decided against it and just want to get a propane torch and some silver solder and flux. But what silver solder should I get?

http://www.weldingsuppliesfromioc.co...fdsh-16/Detail
maybe?
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Old 02-01-2006, 01:24 PM   #2
stev
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Re: what silver-solder to buy and where?

"... Silver and gold jewelry is assembled using "hard" solders and a torch - usually oxy/propane or oxy/acetylene. "Hard" solders are alloys of silver or gold that melt at slightly lower temperatures than Sterling silver or the various karat alloys of gold. The confusion arises because the lowest temperature "hard" solder is sometimes called "soft" solder. A better term might be "easy" for the lowest temperature hard solder. "Hard" solder typically comes in "easy," "medium" and "hard" grades. A complex piece would be started with hard solder, the next elements would be applied using "medium" solder an the last parts tacked on with "easy" solder. This way the solder holding the first elements would not flow or move when the rest of the parts are assembled. ..." --- http://www.rings-things.com/solder.htm

http://www.solder-it.com/solderpaste.asp

Silver Bearing Solder-It (SP-7)

It will solder most ferrous and non-ferrous metals including copper, brass, bronze nickel, platinum, (some) chrome, monel, galvanized, (some)stainless, gold, silver, coated steel, cast iron, black steel, steel.

The Silver Solder Paste above comes in a 0.5oz syringe. It will solder small jobs with the heat from a match or lighter even. It is extremely thermal conductive because of its silver content too.

My wife's cousin works in a jewelry store repairing jewelry all day. He keeps a low flame and hand waves the parts to braze them together. He had to go to school for two years just to learn how to wave his hand.

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Old 02-01-2006, 01:35 PM   #3
JamesAvery22
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Default Re: what silver-solder to buy and where?

Thanks Stev, that stuff sounds too easy to be true =)
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Old 02-01-2006, 09:16 PM   #4
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Default Re: what silver-solder to buy and where?

just go to a regular hardware store and get some silver solder and flux there.

I hear solder-it doesnt work all that great, but never tried it myself.


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Old 02-02-2006, 06:44 AM   #5
BillA
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Default Re: what silver-solder to buy and where?

lol
but using the three together will take practice
I make many 'extra' pieces to be able to finish one, learning still
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Old 02-02-2006, 02:19 PM   #6
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Re: what silver-solder to buy and where?

Quote:
Originally Posted by BillA
lol
but using the three together will take practice
I make many 'extra' pieces to be able to finish one, learning still
Now that can be a good true statement.

I would like to go and see my wife's cousin brazing copper and record his technique. Even then, that gut 5th sense of his is the other component I really can't capture.

The thickness of copper, how much area needs to be brazed, the temps, the hand waving is an art to master. In his line of work, there can be NO mistakes.
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Old 02-02-2006, 02:57 PM   #7
BillA
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Default Re: what silver-solder to buy and where?

my recurring dificulty is thick to thin to thick
artsy indeed to manage the temp
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Old 02-02-2006, 08:21 PM   #8
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Default Re: what silver-solder to buy and where?

I've been welding and brazing for 30+ years. I would use a 60% silver with flux. 60% silver flows real easy. The trick is not to over heat the part and drive the flux out/away. Always apply the silver/solder on the opposite side from the heat. The silver/solder will draw toward the heat. When you see the silver/solder at the heat side your done. Different thickness of parts makes it a little more difficult to heat evenly. There are some heat crayon you can help you with the tempurature control.
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Old 02-02-2006, 09:27 PM   #9
BillA
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Default Re: what silver-solder to buy and where?

overheat is my problem, beads and won't flow
no feel for it
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Old 02-03-2006, 08:10 AM   #10
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Default Re: what silver-solder to buy and where?

Where can I get that 60% silver solder?
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Old 02-03-2006, 09:21 AM   #11
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Default Re: what silver-solder to buy and where?

I got mine from a welder supply store. It's pretty expensive, the last time I bought it. I think I picked up a pound spool in 1980, still have some left. You will also need to pick up the flux that goes with it. The flux will let you know when you are getting close to the correct temp. It will turn to a clear liquid. The store should be able to give you the melting points. Higher the silver content lower the temp will be.

I use a oxygen/acetylene torch for my brazing and soldering. I DONT think a propane porch will get hot enough for what you want to do. I don't recall what the actual melting point is, I think it around 800F. I do so little with the 60% ag. I use a 5% Sil/flux for refigeraton lines. It melts around 1200F.

Unless you really want that much strength, I would stick with the lead solder. You can get at any home improvement store. And you don't need the oxy/ace torch. In water lines the strength comes in the joint design.

You are not going to have any pressure to deal with, use the easy stuff.
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Old 02-03-2006, 03:20 PM   #12
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Default Re: what silver-solder to buy and where?

For 60% Silver and the flux ...

This brand can be found at a few Welding Supply places in both America and Canada. At the top right is locations. Call a number near your area and ask where this product is sold.

http://www.jwharris.com/jwprod/hisilverbrazealloys

SAFETY-SILV® 56 - This high silver (56%) content alloy makes first quality brazes.It is free-flowing with unequaled capillary attraction and deep penetration. Ductility is high, corrosion resistance suitable for all but strong chemical applications. Offers highest elongation of silver brazing alloys. Suitable for use in the food processing industry. The silver color is an excellent match for stainless steel and silverware applications. NSF Certified to NSF C2.

SAFETY-SILV® 40 - Ductile, free-flowing alloy offers economy, good penetration into tight connections, and medium temperature. Silver to light yellow color as in polished brass.

Flux - Use Stay-Silv white brazing flux on applications requiring normal heat; Stay-Silv black flux on heavy parts, or parts heated over a prolonged period.
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