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Portadur P4

portadur_p4magnifying glass

High-gold casting alloy in compliance with DIN EN ISO 9693 +
DIN EN ISO 22674. Type 3, yellow, palladium-free, copper-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: 400 / 15 
Soft annealing, ºC/min: 700 / 15

Portadur P4magnifying glass

Composition
Au 68.5
Ag 12.0
Cu 12.0
Pt 6.9
Zn < 1.0
Ir < 1.0

The recommended solders for this alloy
First solder: Porta OP Lot M-1 
Secong solder: Porta OP Lot W-2 
Laser-welding wires: Portadur P4