Orplid EH
Type 4
yellow / Au 69.0
palladium-free
| Composition: | Au 69.0 / Ag 13.0 / Cu 11.0 / Pt 6.0 / Zn 1.0 |
| Standard: | DIN EN ISO 22674 |
| Colour: | yellow |
| Melting range °C: | 925–890 |
| Soft annealing: | 15 mins at 750 °C / quench in water |
| Hardening: | 15 mins at 450 °C / air |
| Preheating temperature °C: | 700 |
| Casting temperature °C: | 1060 |
| Further heating after melting (secs): | electr.: 15–20 inductive: 5–8 flame: 5–8 |
| Density g/cm3: | 15.5 |
| Solders: | Orplid solders 825, 790, 760 |
| Vickers hardness (HV 5/30): | w: 175 a: 270 g/b: 270 |
| 0.2% proof stress (MPa): | w: 385 a: 670 g/b: 660 |
| Elongation at break (%): | w: 34 a: 12 g/b: 12 |
| Spruing: | Following the rules for dental applications (see General Instructions for Use) |
| Investment: | Phosphate-bonded investment materials |
| Preheating: | 700 °C, 30 to 120 mins until end temperature, depending on size of mould |
| Casting: | 1060 °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 |
| Cleaning: | Ultrasonic cleaning or steam jet cleaning |
| Soldering: | Orplid solders 825, 790, 760 |