platinum solder

[Raimon Pons]

We are interested in knowing the composition of platinum solder.
Actually we make platinum solder with fine silver, but we think is not
the best kind of solder.
Please, tell what are the metals and the average of them.
Thanks

[PeterWRowe]

In article <317720...@redesb.es>, Raimon Pons <rai...@redesb.es>
writes:

The precise formulas for the commercially made solders, either platinum or
otherwise, are usually not given out by the refiners who make them. But
the best information I have is that most commercially made platinum
solders are varying proportions of silver and palladium (NOT platinum,
except for the very highest temperature grades.)

The following is a quote from a publication I've got from the Platinum
Guild International and Johnson Matthey:

"Platinum brazing filler materials in the 700 C to 1500 C temperature
range, do not contain platinum. They are a combination of silver and
palladium. In the 1650 C to 1700 C temperature range, platinum filler
materials can contain as much as 12% platinum..."

Hope this helps.

Peter Rowe

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Peter W. Rowe M.F.A., G.G.
Commercial and custom jeweler and metalsmith
Graduate Gemologist and Lapidary

Opinions expressed here are solely my own....... and subject to change
according to my mood and the state of my art ....

No extra charge for smiles and friendship to those who return it
'Cause life's too short and if we're not having fun, then why be here?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[John M Caro]

In <317720...@redesb.es> Raimon Pons <rai...@redesb.es> writes:
>
>We are interested in knowing the composition of platinum solder.
>Actually we make platinum solder with fine silver, but we think is not

>the best kind of solder.
>Please, tell what are the metals and the average of them.
>Thanks

I don't know the exact proportions but the bulk of it is palladium
the rest is gold and silver. I wish someone had a formula with platinum
as a base as it is a slightly different color .
john caro

[OKAICorp]

The majority of commercial platinum solders are composed mostly of fine
silver, with alloying elements of palladium, platinum, gold and/or copper.
The best solders to use on most platinum pieces are the 'hard' or
'welding' solders. These solders melt at a temperature close to that of
the platinum being joined. They take a little more care to use, but are
worth it for their appearance and color match. I recommend welding
platinum whenever possible using a small chip of the same alloy that is
being joined. The thermal conductivity of platinum makes it easy to weld,
and the pieces finish nicely.

[John Benfield]

In article <4lh4k0$k...@dfw-ixnews5.ix.netcom.com>, joh...@ix.netcom.com
writes

I have just looked up platinum solders in one of my books. Unfortunately
it runs into three pages and describes a number of variations. These are
quite complex and discuss the variuos temperatures and colurs etc. I do
not feel confident in trying to analyse these so all I can offer is the
details of the book and hope you can obtain a copy.

Book title is Working in Precious Metals by Ernest A Smith.
Pulished by N.A.G. Press Ltd, Colchester, Essex, United Kingdom.
ISBN 7198 0032 3
My edition published 1980.

Gives detailed information albeit technical on many aspects of precious
metals.

Just read the opening paragraph on platinum solders.Quote "Special
solders for platinum work are sold by refining firms and their
preparation is seldom attempted by manufacturing jewellers or craftsmen
owing to the high temperature and expert knowledge required in their
melting and fabrication" end Quote.
Having said that it does go on to give the information required.

Hope this has been some use to.

--
John Benfield

[PeterWRowe]

In article <tLt6LCAr...@huncote.demon.co.uk>, John Benfield
<jo...@huncote.demon.co.uk> writes:

>I have just looked up platinum solders in one of my books. Unfortunately
>it runs into three pages and describes a number of variations. These are
>quite complex and discuss the variuos temperatures and colurs etc. I do
>not feel confident in trying to analyse these so all I can offer is the
>details of the book and hope you can obtain a copy.
>
>Book title is Working in Precious Metals by Ernest A Smith.
>Pulished by N.A.G. Press Ltd, Colchester, Essex, United Kingdom.
>ISBN 7198 0032 3
>My edition published 1980.
>
>

While "Working in precious metals" is a very useful book at times, it's
important to point out that the 1980 NAG edition is simply a facsimile
reprint of the original 1933 edition.

It is to be expected that current metalurgical knowledge of the precious
metals, especially platinum, has advanced and changed somewhat in the last
63 years...

So keep the above dates in mind when relying on info in this otherwise
finely done book.