Cehadent Plus
Type 4
white / Au 38,0
copper-free
| Composition: | Au 38.0 / Ag 15.5 / Ga 1.0 / Pd 37.0 / In 8.5 |
| Standard: | DIN EN ISO 22674 and DIN EN ISO 9693 |
| Colour: | white |
| Melting range °C: | 1275 - 1160 |
| Soft annealing: | 15 mins at 1100 °C / quench in water |
| Hardening: | 15 mins at 600 °C / air |
| Preheating temperature °C: | 850 |
| Casting temperature °C: | 1425 |
| Further heating after melting (secs): | elektr.: 120–180 inductive: 10–15 flame: 10–15 |
| Density g/cm3: | 13,3 |
| CTE 25°C-500°C (µm/mK): | 14,2 |
| CTE 25°C-600°C (µm/mK): | 14,3 |
| Soldering before firing: | Orplid Keramik solder 1110 |
| Soldering before firing: | Orplid solder CF 720 |
| Vickers hardness (HV 5/30): | w: 220 a: 295 g/b: 255/250 |
| 0,2% proof stress (MPa): | w: 360 a: 590 g/b: 430/435 |
| Elongation at break (%): | w: 10 a: 12 g/b: 10/13 |
| Spruing: | Following the rules for dental applications (see General Instructions for Use) |
| Investment: | Phosphate-bonded investment materials (Cehacast Speed) |
| Preheating: | 850 °C, 30 to 120 mins until end temperature, depending on size of mould |
| Casting: | 1425 °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 940°C without vacuum |
| Soldering before firing: | Orplid Ceramic solder 1110 |
| Soldering after firing: | Orplid solder CF 720 |
| Firing: | For normally expanding ceramic materials (e.g. CeHa WHITE® Classic) |