Orplid Universal

Type 4
deep yellow / Au 72.6
palladium-free, copper-free

Composition: Au 72.6 / Pt 15.6 / Ag 7.0 / Zn 3.0 / Rh 1.0 /
Ta 0.7 / Mn 0.1
Standard: DIN EN 22674 and DIN EN ISO 9693
Colour: deep yellow
Melting range °C: 1070–995
Soft annealing: 15 mins at 750 °C / quench in water
Hardening: 15 mins at 500 °C / air
Preheating temperature °C: 750
Casting temperature °C: 1280
Further heating after melting (secs): electr.: 20–30
inductive: 5–8
flame: 5–8
Density g/cm3: 17.4
CTE 25°C–500°C (µm/mK): 14.2
CTE 25°C–600°C (µm/mK): 14.6
Soldering before firing: Orplid Ceramic solder C 970
Soldering after firing: Orplid solder 735
Vickers hardness (HV 5/30): w: 140
a: 220
g/b: 190
0.2% proof stress (MPa): w: 250
a: 500
g/b: 305/455
Elongation at break (%): w: 22
a: 9
g/b: 15/12
Spruing: Following the rules for dental applications (see General Instructions for Use)
Investment: Phosphate-bonded investment materials (Cehacast P or Cehacast Speed)
Preheating: 750 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting: 1230 °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: 10 mins at 850°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 C 970
Soldering after firing: Orplid solder 735
Firing: For normally expanding ceramic materials with a firing temperature of up to 900°C (e.g. CeHa WHITE® CLASSIC)