Composition: | Au 55.0 / Ag 27.0 / Pd 12.0 / In 4.0 / Zn 1.4 / Sn 0.5 / Ir 0.1 |
Standard: | DIN EN ISO 22674 und DIN EN ISO 9693 |
Colour: | yellow |
Melting range °C: | 1090–960 |
Soft annealing: | - |
Hardening: | 15 mins at 500 °C / air |
Preheating temperature °C: | 850 |
Casting temperature °C: | 1230 |
Further heating after melting (secs): | electr.: 20–30 inductive: 5–10 flame: 5–10 |
Casting crucible: | Graphite/ceramic |
Density g/cm3: | 14.2 |
CTE 25°C–500°C (µm/mK): | 16.1 |
CTE 25°C–600°C (µm/mK): | 16.2 |
Soldering before firing: | Orplid Ceramic solder CF 950 |
Soldering after firing: | Orplid solder CF 720 |
Vickers hardness (HV 5/30): | w: - a: 230 g/b: 210/230 |
0.2% proof stress (MPa): | w: - a: 500 g/b: 460/580 |
Elongation at break (%): | w: - a: 3 g/b: 4/5 |
Spruing: | Following the rules for dental applications (see General Instructions for Use) |
Investment: | Phosphate-bonded investment materials |
Preheating: | 850 °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 110–125 µm aluminium oxide. Pressure should not exceed 2 bar |
Cleaning: | Steam jet cleaning or boiling in distilled water |
Oxide firing: | 5 mins at 800°C with vacuum. Afterwards, always clean in a preheated acid bath, e.g. Neacid, (for up to 5 mins), or sandblast with 50-110 µm aluminium oxide, at up to 2 bar pressure; clean 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 |