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Porta Aurium

porta_auriummagnifying glass

Reduced-Gold casting alloy in compliance with DIN EN ISO 9693 +
DIN EN ISO 22674. Type 4, yellow, Cu-free

Matching solders
Investment material: Phosphate / plaster-bonded
Casting crucible: Graphite / ceramic

Post melting time in seconds

  • Resistance heating: 30 - 60
  • HF induction: 5 - 15
  • Propane / oxygen flame: 5 - 15

Oxidation without vacuum, ºC/min: –
Tempering, °C/min: 550 / 15
Soft annealing, ºC/min: -

Porta Auriummagnifying glass

Composition
Au 55.0
Ag 23.0
Pt 12.0
Pd 3.0
In 3.5
Zn 3.0
Rh 0.5

The recommended solders for this alloy
Solder befor firing: Porta Optimum Lot 940
Solder after firing: Porta Optimum Lot 710
Laser-welding wires: Portadur IN