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[ Alloys ] [ JP-80 ] [ Technical Guide]


  Properties
Category PFM
Nobility High Noble
Melting Range 2170°F to 2260°F
Coef. of Thermal Expansion
   from 25°C to 500°C
   from 25°C to 600°C
14.3x10-6K-1
14.6x10-6K-1
Density 16.0 g/cm3
Grain Size 32 microns
Hardness 195 HV
Tensile Elongation 20%
Tensile Yield Strength 55,900 psi
Ultimate Tensile Strength 74,200 psi
Chemistry
Gold 75% Palladium 10%
Silver 10% Platinum 3%
Indium 2% Rhenium less than 1%

Waxing / Spruing

 .3mm for single units and .5mm for bridge work.
Investment
 A phosphate-bonded investment with or without carbon.
Burnout
 1350°F (730°C)
Melting / Casting
One extra wind of the casting arm is required (3-4 winds typical)
Multi-orifice torch: 10 psi fuel and 20 psi oxygen.
Cast at around 2350°F (1290°C)
Finishing
 Finish with carbides or aluminum oxide stones. Blast porcelain receiving surface with non-recycled aluminum oxide. Clean in ultrasonic for 10 minutes.
Conditioning
 Oxidize from 1200°F (650°C) to 1800°F (980°C) in air. Hold for 5 minutes. Proceed with normal opaque technique.
Pre-solder
 Recommended solder: P80, LX
Flux-Brown Fluoride
Post-solder
 Recommended solder: 1400
Flux-Brown Fluoride