Orplid Keramik 3

Type 4
pale yellow / Au 84.0 

Composition: Au 84.0 / Pt 8.2 / Pd 4.7 / In 2.4 / Ag 0.5 / Cu 0.1 / Ir 0.1
Standard:DIN EN ISO 22674 and DIN EN ISO 9693
Colour:pale yellow
Melting range °C:1200–1085
Soft annealing:15 mins at 900 °C / quench in water
Hardening:15 mina at 600 °C / air
Preheating temperature °C:850
Casting temperature °C:1350
Further heating after melting (secs): electr.: 90–120
inductive: 5–10
flame: 5–10
Density g/cm3:18.1
CTE 25°C–500°C (µm/mK):14.3
CTE 25°C–600°C (µm/mK):14.5
Soldering before firing:Orplid Ceramic solder 1050
Soldering after firing: Orplid solders 760, 735
Vickers hardness (HV 5/30):w: 110
a: 240
g/b: 190
0.2% proof stress (MPa):w: 195
a: 470
g/b: 370/420
Elongation at break (%):w: 22
a: 13
g/b: 14/14
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:1350 °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
Soldering before firing:Orplid Ceramic solder 1050
Soldering after firing:Orplid solders 760; Orplid Lot 735
Firing:For normally expanding ceramic materials (e.g. CeHa WHITE® Classic)
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