Back to Ganoksin | FAQ | Contact

Sterlium plus or S57NA or S88 sterling alloys

I would like to try the new de-ox sterling alloys. I’d like one that
acts like old-fashioned sterling. From posts here, I gather that
S57NA or S88 fill the bill. Is Sterlium in the same category, or is
it a brand name for someone’s argentium?


Is Sterlium in the same category, or is it a brand name for
someone's argentium?" 

Here is a list where you can find many answers. [PDF file]

Notice that S57NA and S88 are not mentioned,however, UPM’s homepage
gives you a perfect list of all there products. Mostly changes are
found in the composition of the new alloy for another color or other
specifics concerning the alloy. All the different alloy’s are answers
to argentium. Answer from different company’s for the demand of
exotic alloy’s.

Have fun and enjoy

Hi Janet,

The United S57NA and the S88 are master alloys that you mix with
92.5% fine silver. The Sterlium Plus is ready made Sterling Silver
available in casting grain,wire,sheet and fabricated products. The
ready made Sterlium Plus products are available from United and
Stuller Inc. The Sterlium plus is made with the S57NA Alloy. It
fabricates and casts like regular sterling silver and is easy to use.
The casting temperature for these alloys will be a bit hotter than
traditional Sterling Silver.

Best regards,

Jim Sivertsen
United Technical Dept.


The United S57NA and the S88 are master alloys that you mix with
92.5% fine silver. 

Raising the silver slightly gives you even better results. Ask UPM
for more if you like.

Have fun and enjoy

Hello Janet,

I thought I should reply to your post to ensure there is no confusion
about Argentium silver alloys. These are a family of alloys which
contain about 1% germanium, are protected by numerous patents and are
manufactured in different countries by our approved manufacturing
partners. The patents basically cover any silver alloy containing
between 0.5-3.0% germanium and if anyone is trying to copy the
Argentium silver alloy formulations they would be infringing these
patents and and we would take the appropriate action.

Just to also take this opportunity to pick up an the descriptions of
different silver alloys by Jim Sivertsen of United; the 'basic’
sterling silver composition of 92.5% silver and 7.5% copper I try to
refer to as traditional sterling silver in any posts or articles to
avoid the any confusion with it been mistaken for one of the
different deox silver alloys that are available with their varying
additions of zinc, indium, tin and silicon.

Charles Allenden
Argentium International

What about this Stuller sterling called “Continuum”? Has anybody had
any experience with it? Apparently contains palladium and some other
metals. Supposed to be harder (Vickers 97…) than regular SS, but
not as hard as 14KY.

-BK in BWA