Search Jensen
[ Alloys ] [ Galileo ] [ Technical Guide]


  Properties
Category Crown & Bridge
Nobility High Noble
  Type IV
Melting Range 1740°F to 1940°F
Density 16.4 g/cm3
Grain Size 25 microns
Hardness
  Hardened
  Softened
 
240 HV
230 HV
Tensile Elongation
  Hardened
  Softened
 
6%
10%
Yield Strength
  Hardened
  Softened
 
63,820 psi
58,010 psi
Ultimate Tensile Strength
  Hardened
  Softened
 
81,220 psi
81,220 psi
Modulus of Elasticity
  Hardened
  Softened
 
14.5x106 psi
14.5x106 psi
Chemistry
Gold 74.3% Silver 11.0%
Platinum 7% Palladium 3.0%
Zinc 2.5% Indium 2.0%
Iridium less than 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
 Gypsum or phosphate bonded investment.
Burnout
 1200°F (650°C) for gypsum bonded investments. 1300°F (705°C) can be used for phosphate bonded investments.
Melting / Casting
No extra winds of the casting arm are required (2-3 winds typical)
Multi-orifice torch: 5 psi fuel and 10 psi oxygen.
The alloy will fully puddle and form a ball before it is ready to cast. DO NOT OVERHEAT.
Cast at around 2050°F (1115°C.)
DO NOT USE CASTING FLUX.
Finishing and Polishing
 Use standard techniques.
Soldering
 Recommended high temperature solder: Satellite
Recommended low temperature solder: 1400
Flux-Brown Fluoride