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 cruciblel: Graphite / ceramic

Post melting time in seconds

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

Oxidation without vacuum °C/min: – 
Tempering, °C/min: 500 / 15 
Soft annealing, ºC/min: 750 / 15

Composition
Au 87.9
Ag 5.0
Pt 4.0
Zn 3.0
Ir < 1.0

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