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 |
| Colour: | yellow |
| 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: | 19.0 |
| 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: 90 a: 170 g/b: 145/170 |
| 0.2% proof stress (MPa): | w: 195 a: 420 g/b: 440/515 |
| Elongation at break (%): | w: 22 a: 5 g/b: 10/12 |
| 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: | 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 50–110 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 |