Type 4
white / Au 15.0
copper-free
Composition: | Pd 52.3 / Ag 20.0 / Au 15.0 / In 6.0 / Sn 5.5 / Ga 1.0 / Pt 0.1 / Re 0.1 |
Standard: | DIN EN ISO 22674 and DIN EN ISO 9693 |
Colour: | white |
Melting range °C: | 1265–1145 |
Soft annealing: | 15 mins at 950 °C / quench in water |
Hardening: | 15 mins at 600 °C / air |
Preheating temperature °C: | 850 |
Casting temperature °C: | 1420 |
Further heating after melting (secs): | electr.: 120–180 inductive: 10–15 flame: 10–15 |
Density g/cm3: | 12.1 |
CTE 25°C–500°C (µm/mK): | 14.1 |
CTE 25°C–600°C (µm/mK): | 14.2 |
Soldering before firing: | Cehadentor Ceramic solder 1110 |
Soldering after firing: | Orplid solders 760, 735 |
Vickers hardness (HV 5/30): | w: 265 a: 325 g/b: 290/265 |
0.2% proof stress (MPa): | w: 545 a: 685 g/b: 600/620 |
Elongation at break (%): | w: 9 a: 4 g/b: 12/6 |
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: | 1420°C – increase by 20°C–30°C for resistance-heated casting units. Use 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 |
Soldering before firing: | Cehadentor Ceramic solder 1110 |
Soldering after firing: | Orplid solders 760, 735 |
Firing: | Normally expanding ceramic materials, normal cooling |