Orplid CF

Type 4
pale yellow / Au 72.0 
copper-free

Composition:Au 72.0 / Ag 17.4 / Pd 6.5 / Zn 3.0 / Pt 0.5 /
Sn 0.5 / Ir 0.1
Standard:DIN EN ISO 22674 and DIN EN ISO 9693
Colour: pale yellow
Melting range °C:1060–950
Soft annealing:15 mins at 700 °C / quench in water
Hardening:15 mins at 450 °C / air
Preheating temperature °C:700
Casting temperature °C:1200
Further heating after melting (secs):electr.: 15–20
inductive: 5–8
flame: 5–8
Density g/cm3:15.4
CTE 25°C–500°C (µm/mK):16.4
CTE 25°C–600°C (µm/mK):16.9
Soldering before firing:Orplid Ceramic solder CF 950
Soldering after firing:Orplid solder CF 720
Vickers hardness (HV 5/30):w: 140
a: 220
g/b: 220
0.2% proof stress (MPa):w: 310
a: 560
g/b: 515/630
Elongation at break (%):w: 27
a: 17
g/b: 11/9
Spruing:Following the rules for dental applications (see General Instructions for Use)
Investment:Phosphate-bonded investment materials (Cehacast P or Cehacast Speed)
Preheating:700 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting:1200 °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! Avoid using high speeds or applying heavy pressure (scale formation); sandblasting with 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 780°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 CF 950
Soldering after firing:Orplid solder CF 720
Firing:For highly expanding ceramic materials (e.g. CeHa WHITE® LF)
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