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  Properties
Category PFM
Nobility High Noble
Melting Range 1930°F to 2110°F
Coef. of Thermal Expansion
   from 25°C to 500°C
   from 25°C to 600°C
14.2x10-6K-1
14.4x10-6K-1
Density Grain Size 19.0 g/cm312 microns
Hardness
  Porcelain Fired
  ISO Heat Treated
 
175 HV
160 HV
Tensile Elongation
  Porcelain Fired
  ISO Heat Treated
 
11%
14%
Tensile Yield Strength
  Porcelain Fired
  ISO Heat Treated
 
55,800 psi
50,000 psi
Ultimate Tensile Strength
  Porcelain Fired
  ISO Heat Treated
 
67,800 psi
62,600 psi
Modulus of Elasticity 12.5x106 psi
Chemistry
Gold 88% Platinum 9.5%
Indium 1.5% Silver less than 1%
Iron less than 1% 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
 1300°F (705°C)
Melting / Casting
No extra winds of the casting arm are required (2-3 winds typical)
Multi-orifice torch: 10 psi fuel and 20 psi oxygen.
Cast at around 2210°F (1210°C)
Finishing
 Finish with aluminum oxide stones. Blast porcelain receiving surface with non-recycled aluminum oxide. Clean in ultrasonic for 10 minutes.
Conditioning
 Oxidize from 1200°F (650ºC) to 1800°F (980ºC) in air. Hold for 5 minutes. Proceed with normal opaque technique.
Polishing
 Use low speeds and light pressure. We recommend the use of tin oxide and/or high shine rubber wheels for easy final polishing.
Pre-solder
 Recommended solder: CPS
Flux-Brown Fluoride
Post-solder
 Recommended solder: 650
Flux-Brown Fluoride
  **1742°F for 10 minutes