AURUMED Bio Eco 70
Type 3
light yellow / Au 55.0
palladium- and copper-free
| Composition: | Au 55.0 / Ag 27.5 / Pt 13.5 / Zn 1.4 / Sn 0.5 / In 2.0 / Ir 0.21 |
| Standard: | DIN EN ISO 22674 und DIN EN ISO 9693 |
| Colour: | light yellow |
| Melting range °C: | 1060-960 |
| Soft annealing: | 15 mins at 800 ° C / quench in water |
| Hardening: | 15 mins at 550 °C / air |
| Preheating temperature °C: | 700 |
| Casting temperature °C: | 1210 |
| Further heating after melting (secs): | electr.: 20–30 inductive: 5–10 flame: 5–10 |
| Density g/cm3: | 15.4 |
| CTE 25°C–500°C (µm/mK): | 16.2 |
| CTE 25°C–600°C (µm/mK): | 16.4 |
| Soldering before firing: | Orplid Ceramic solder CF 950 |
| Soldering after firing: | Orplid solder CF 720 |
| Vickers hardness (HV 5/30): | w: 105 a: 155 g/b: 130/115 |
| 0.2% proof stress (MPa): | w: 186 a: 310 g/b: 245/230 |
| Elongation at break (%): | w: 16 a: 9 g/b: 11/15 |
| Spruing: | Following the rules for dental applications (see General Instructions for Use) |
| Investment: | Phosphate-bonded investment materials |
| Preheating: | 700 °C, 30 to 90 mins until end temperature, depending on size of mould |
| Casting: | 1275°C – possibly increase by 20°C–30°C for resistance-heated casting units. Use ceramic crucible (graphite crucibles also possible) |
| Finishing: | With carbide burs and/or ceramic-bonded stones. Always grind in one direction only! Sandblasting at a flat angle, using 110–150 µm aluminium oxide. Pressure should not exceed 2 bar |
| Cleaning: | Steam jet cleaning or boiling in distilled water |
| Oxide firing: | 10 mins at 800°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 solder CF 950 |
| Soldering after firing: | Orplid solder CF 720 |
| Firing: | For highly expanding ceramic materials |