ARGENTIUM SILVER CASTING GRAIN™

How to use Argentium Silver Casting Grain 97% Ag

DESCRIPTION:	Argentium™ Silver is a new tarnish and firescale resistant casting alloy, which can be precipitation hardened to achieve almost twice the hardness of as-cast regular sterling silver.
FORM:	Argentium™ Sterling Silver casting grain comes as roughly spherical particles ranging from 1.75 to 4.75 mm in size.
ITEM NUMBER:	SSAR97
COMPOSITION:	97% Silver
DENSITY:	5.45 troy ounces/in³
SOLIDUS:	1522° F (828°C)
LIQUIDUS:	1724°F (940°C)
CASTING:	When investment casting, a pour temperature of 1780-1880°F (950-980°C) and a flask temperature below 1350°F (677°C) are recommended. If casting without a protective atmosphere, the use of borax flux or graphite powder is effective. After casting the metal, a minimum of 15 minutes air cooling is recommended before quenching. Investment may be easily removed with water spray, ultrasound, and pickling solution.
HARDENING:	Typical hardness of rapidly quenched pieces is 70 DPH. Flasks cooled to room temperature can approach 90 DPH and heat-treated castings can approach 125 DPH! (Approximately twice the hardness of as-cast standard Sterling silver!). To obtain this hardness, quench the flask after air cooling for 15 minutes. Anneal in an oven at 1050°F to 1150°F (566°C-621°C) for 30 to 60 minutes and quench after visible heat has dissipated. Then, place the castings in an oven at 580°F (304°C) for 45 minutes and air cool to room temperature.
POLISHING:	To avoid contamination from other alloys in the workshop, separate wheels should be used for Argentium™ Silver. If this is not possible, thoroughly rake wheels before use. After final polishing, heat the castings in an air atmosphere to 250°F (121°C) for 20 minutes to activate the germanium oxide layer, which is highly tarnish resistant.
SOLDERING:	Argentium Silver displays a lighter color when heated. It is important to avoid overheating this metal, therefore heating operations should be carried out in a darkened area.
REMELTING:	Use at least a 50% fresh / 50% scrap mix. For higher quality pieces, using more fresh metal will yield superior results. It is important that used trees and buttons are free from investment powder residue to avoid contamination.

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Warranty Clause: G&S Metals, Inc. believes this data to be accurate and reliable. However, these are recommendations only given free of charge and should be employed by you with discretion and risk. G&S Metals, inc. assumes no responsibility for difficulties or damages incurred by adhering to this information.

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