Orplid Keramik 2
Type 3
deep yellow / Au 87.5
palladium-free, silver-free, copper-free
| Composition: | Au 87.5 / Pt 11.0 / In 1.0 / Fe 0.5 |
| Standard: | DIN EN ISO 22674 and DIN EN ISO 9693 |
| Colour: | deep yellow |
| Melting range °C: | 1110–1030 |
| Soft annealing: | 15 mins at 900 °C / quench in water |
| Hardening: | 15 mins at 640 °C / air |
| Preheating temperature °C: | 800 |
| Casting temperature °C: | 1280 |
| Further heating after melting (secs): | electr.: 60–90 inductive: 5–10 flame: 5–10 |
| Density g/cm3: | 19.1 |
| CTE 25-500°C (µm/mK): | 14.4 |
| CTE 25-600°C (µm/mK): | 14.2 |
| Soldering before firing: | Orplid Ceramic solder 1020 |
| Soldering after firing: | Orplid solders 760, 735 |
| Vickers hardness (HV 5/30): | w: 90 a: 175 g/b: 175 |
| 0.2% proof stress (MPa): | w: 155 a: 335 g/b: 290/350 |
| Elongation at break (%): | w: 24 a: 13 g/b: 16/144 |
| Spruing: | Following the rules for dental applications (see General Instructions for Use) |
| Investment: | Phosphate-bonded investment materials |
| Preheating: | 800 °C, 30 to 120 mins until end temperature, depending on size of mould |
| Casting: | 1280 °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! Avoid using high speeds or applying heavy pressure (scale formation); sandblasting with 50–125 µm aluminium oxide. Pressure should not exceed 2 bar |
| Cleaning: | steam jet cleaning or boiled in distilled water |
| Oxide firing: | 5 mins at 940°C without vacuum |
| Soldering before firing: | Orplid Ceramic solder 1020 |
| Soldering after firing: | Orplid solders 760, 735 |
| Firing: | For normally expanding ceramic materials |