Metal Prices: Silver $16.74 Gold $1266.36Plat $927.11

Prices based on London PM Fix (Last Updated: December 15, 2017)

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Tips For Using Argentium® Silver

The reasons for using Argentium® Silver are many. Argentium® Silver is an anti-oxidizing, anti-fire scale Sterling alloy that is extremely tarnish resistant. It is the most important advance in silver technology in modern times. It stays bright and beautiful for weeks, months, for years and requires only an occasional wipe with a soft cloth to remove a smudge or finger mark.


Fabrication and workability characteristics are much better than standard Sterling silver, and it can be heat treated to achieve hardness approximately twice as strong as standard Sterling Silver. Unlike traditional Sterling Silver, Argentium® Silver casts and solders without fire scale and is laser and resistant weldable. Excellent for making durable, tarnish resistant silver products. Argentium® Silver is available in casting grain, sheet, round wire, half round wire, square wire, tubing (limited supply) and solders.

Alloy Information / Properties
This patented alloy contains 93.5% fine silver (exceeding the Sterling Standard), copper and germanium.
Melting range: 803-903°C / 1477-1657°F
Relative density: 10.4g/cm³
Annealed hardness: 64HV

Argentium 935 Original can be either torch or furnace annealed. When annealing, it is recommended that the material is allowed to reach a pale glow (620°C / 1148°F) rather than the brighter red glow that is normally associated with annealing traditional Sterling silver (temperature/metal colour recognition is easier to judge when working in a shaded area). Allow to cool until the red glow has disappeared (below 550°C / 1022°F) before touching or quenching. NB. Argentium Silver retains its heat for longer than traditional Sterling silver and touching or quenching too quickly will cause cracking.
Optimum furnace annealing results will be achieved by heating at 620-670°C / 1148-1238°F (dependent on the thickness of the material being annealed), for a period of 20-40 minutes, in a controlled atmosphere furnace with a ratio of 95:5 nitrogen:hydrogen or alternatively either just nitrogen or argon (low hydrogen is necessary to optimise tarnish resistance).

Optimising Tarnish Resistance: Argentium Silver has the unique property where a layer of germanium oxide naturally develops on the surface of the metal to form a protective barrier (this oxide is self-replenishing if the surface is abraded). The formation of the germanium oxide layer can be accelerated by heating in air at 100°C / 212°F for 3 hours. NB. To optimise this process it is important that careful cleaning is undertaken.

Tumble Finishing: Successful tumble finishing has been done using rough cut with epoxy cones and triangles in a vibratory tumbler, and also by using a steel shot mixture in a rotary tumbler. It is very important to maintain clean shot and solution.

Polishing: To avoid contamination from other silver and gold alloys in the workshop environment, it is ideal to have separate polishing wheels for use on Argentium® Silver only. If this is not possible, thoroughly rake wheels before use.

Soldering: Argentium® Silver displays a lighter color when heated. If the metal looks yellow or light orange, it is too hot. Low temperature solders are therefore recommended. For maximum results, use Argentium® solders now available in sheet and round wire in extra easy, easy, medium and hard flows. It is important to avoid overheating this metal. Use standard soldering fluxes.

Heating, quenching and pickling Heating applications and heat/colour recognition Argentium® silver displays a paler colour glow than traditional sterling silver at red-hot temperatures.

Torch and furnace annealing

 • Carry out torch annealing and soldering procedures in a shaded area to prevent overheating.

 • Make sure your Argentium® silver is securely supported whilst heating.

• Wait until the red glow has disappeared from your Argentium® silver before touching or moving, as this may cause cracking.

• Recommended furnace annealing temperature: 600-650°C/1112-1202°F for 20-45 minutes (dependent on the thickness of the material being annealed).

• When furnace annealing using a protective atmosphere, it is important that the furnace gas does not deplete the germanium oxide surface layer as this will diminish tarnish and firestain resistance.

Use inert furnace atmospheres (i.e. nitrogen or argon) or an atmosphere containing maximum 5-10% hydrogen in nitrogen.

Don’ts

• Be careful not to overheat.

• Furnace atmospheres containing more than 10% hydrogen are not recommended. Quenching Argentium® silver retains its heat for longer than traditional sterling.

• Do not quench Argentium® silver too quickly as cracking may occur.

• It is hazardous to quench metals in pickle solutions.

Do’s

 • After annealing, wait for the red glow to disappear before quenching (best judged in a shaded area).

• Always quench in water.

Pickling

To avoid any cross-contamination with other alloys by having a separate pickle pot for Argentium® Silver

Recommended pickling solutions:

• Sodium Bisulphate

• Weak Sparex

• Phosphoric Acid

• Sulphuric Acid

Do’s

• Dilute pickle solution as advised by the supplier.

 • Heat pickle solution to recommended working temperature.

• Use pickling solution that is not over-used.

Don'ts

• Do not use Hydrofluoric Acid with Argentium® silver - Hydrofluoric Acid dissolves the protective germanium oxide and diminishes tarnish resistance.

• Do not use old or over-used pickle as the strength of any pickling solution will reduce with use and saturated solutions can leave unwanted deposits on immersed items.

For additional information visit Argentium Silver for their brochure and facts file and Argetium Blog Spot.  

  • Argentium® Silver sheet is flat and soft temper. It is available in pieces 6” in width up to  24” lengths.  We will try to accommodate your required size but one dimension must be 6” and the other in increments 1” or larger.
  • Argentium® Silver Solder in easy, extra easy, medium and hard flows should only be used with our Argentium® products. It is not advisable to combine standard sterling silver solders with Argentium®.
  • Argentium® Silver Sheet Solder is supplied in 1/2 T.O. (1” x 4” flat sheet) or in round wire.  Argentium wire solder is supplied in a 10 foot minimum.  (1 T.O. = 20ft.)
  • Argentium® Round Wire is supplied 2g-32g Supplied soft and half hard temper, coiled. Smaller gauge, longer lengths maybe spooled.
  • Argentium® Square Wire is supplied 2g-24g Supplied in soft and half hard temper, coiled. Smaller gauge, longer lengths maybe spooled. 
  • Argentium® Half Round Wire is supplied 6g-22g Supplied in soft and half hard temper, coiled. Smaller gauge, longer lenghts maybe spooled. 
  • Argentium® Bezel Strip is supplied in 28g and 30g. Supplied in soft temper and continuous lengths of up to 10 troy ounces, with a 1 foot minimum order. Contact us if you have other specific needs.



Argentium® silver is in stock and ready for immediate shipping! Argentium® Findings and Argentium® Casting Grain!