Orplid Keramik PF

Type 4
pale yellow / Au 77.7
palladium-free, silver-free, copper-free

Composition:Au 77.7 / Pt 19.5 / Zn 2.0 / Ta 0.7 / Ir 0.1
Standard:DIN EN ISO 22674 and DIN EN ISO 9693
Colour:pale yellow
Melting range °C:1165–1050
Soft annealing:15 mins at 900 °C / quench in water
Hardening:15 mins at 550 °C/ air
Preheating temperature °C:800
Casting temperature °C:1320
Further heating after melting (secs): electr.: 90–120
inductive: 5–10
flame: 5–10
Density g/cm3:19.1
CTE 25°C–500°C (µm/mK):14.0
CTE 25°C–600°C (µm/mK):14.1
Soldering before firing:Orplid Ceramic solder 1050
Soldering after firing:Orplid solders 760, 735
Vickers hardness (HV 5/30):w: 110
a: 220
g/b: 220/260
0.2% proof stress (MPa):w: 260
a: 410
g/b: 460/550
Elongation at break (%):w: 23
a: 15
g/b: 11/10
Spruing:Following the rules for dental applications (see General Instructions for Use)
Investment:Phosphate-bonded investment materials (Cehacast P or Cehacast Speed)
Preheating:850 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting:1320 °C, possibly increase by 20°C–30°C for resistance-heated vacuum pressure casting. Graphite crucible or open flame with ceramic crucible
Finishing:With carbide burs and/or ceramic-bonded stones. Always grind in one direction only! Sandblasting at a flat angle, using 50–125 µm aluminium oxide. Pressure should not exceed 2 bar
Cleaning:Steam jet cleaning or boiling in distilled water
Oxide firing:5 mins at 940°C without vacuum. Afterwards, always clean in a preheated acid bath, e.g. Neacid, (for 10 mins) or sandblast with 50–125 µm aluminium oxide. Pressure should not exceed 2 bar. Clean thoroughly with a steam jet
Soldering before firing:Orplid Ceramic solder 1050
Soldering after firing:Orplid solder 760; Orplid solder 735
Firing:For normally expanding ceramic materials (e.g. CeHa WHITE® Classic)
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