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Porta Maximum

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High-gold casting/veneering alloy in compliance with DIN EN ISO 9693 +
DIN EN ISO 22674. Type 4, yellow, 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: 800 / 10
Tempering, °C/min: 450 / 15 
Soft annealing, ºC/min: -

Porta Maximummagnifying glass

Composition
Au 70.0
Ag 10.0
Pt 10.0
In 5.0
Pd 2.5
Zn 2.0
Rh < 1.0

The recommended solders for this alloy
Solder befor firing: Porta Optimum Lot 900
Solder after firing: Porta Optimum Lot 710
Laser-welding wires: Portadur IN