Orplid Keramik 5

Type 4
yellow / Au 86.2
palladium-free, silver-free, copper-free

Composition:Au 86.2 / Pt 11.5 / Zn 1.5 / Ru 0.4 / Ta 0.3 / Mn 0.1
Standard:DIN EN ISO 22674 and DIN EN ISO 9693
Melting range °C:1100–1035
Soft annealing:15 mins at 800 °C / quench in water
Hardening:15 mins at 450 °C / air
Preheating temperature °C:850
Casting temperature °C:1250
Further heating after melting (secs): electr.: 60–90
inductive: 5–10
flame: 5–10
Density g/cm3:19.1
CTE 25°C–500°C (µm/mK):14.1
CTE 25°C–600°C (µm/mK):14.3
Soldering before firing:Orplid Ceramic solder 1020
Soldering after firing:Orplid solders 760, CF 720
Vickers hardness (HV 5/30):w: 150
a: 170
g/b: 190
0.2% proof stress (MPa):w: 200
a: 500
g/b: 440/515
Elongation at break (%):w: 22
a: 13
g/b: 10/12
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:1250 °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 900°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 Lot 1020
Soldering after firing:Orplid solder 760; Orplid solder CF 720
Firing:For normally expanding ceramic materials (e.g. CeHa WHITE® Classic)
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