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[ Alloys ] [ JWG ] [ Technical Guide]


  Properties
Category Crown & Bridge
Nobility Noble
Type Type III
Melting Range 1960°F to 2075°F
Density 10.6 g/cm3
Hardness 160 HV
Tensile Elongation 16%
Tensile Yield Strength 42,400 psi
Ultimate Tensile Strength 64,000 psi
Chemistry
Silver 71.5% Palladium 25%
Indium 2.5% Gold 2%
Zinc 1%    

Waxing / Spruing
Sprue to the bulkiest section.
Sprue diameter should be equal to the thickness of the bulkiest section.
Sprues longer than 3/8" should have a reservoir 1/16" from pattern.
Patterns should be no farther than 1/4" from top of investment.
Use direct method for single units and small castings.
Use indirect method for bridges and larger castings.
Investment
 Phosphate bonded investment.
Burnout
 1300°F (705°C)
Melting / Casting
Wind casting arm one turn more than normal.
A cloudy surface will appear as the alloy melts. Continue heating until the surface clears. DO NOT OVERHEAT.
Cast at around 2175°F (1190°C).
Bench cool to a dull red before water quenching.
Finishing and Polishing
 Use standard techniques.
Soldering
 Recommended Solder: 1400 Solder
Flux-Brown Fluoride