Degudent U

Type 4
white / Au 77.3
 

Composition:

Au 77.3 / Pt 9.8 / Pd 8,9 / In 1.5 /  Ag 1.2 / Sn 0.5 / Cu 0.3 /

Fe 0.2 Re 0.2 / Ir 0.1

Standard: DIN EN 22674 and DIN EN ISO 9693
Colour: white
Melting range °C: 1260-1150
Soft annealing: 15 mins at 950 °C / quench in water
Hardening: 15 mins at 600 °C / air
Preheating temperature °C: 850
Casting temperature °C: 1410
Further heating after melting (secs): electr.: 180
inductive: 5–10
flame: 5–10
Density g/cm3: 18.0
CTE 25°C–500°C (µm/mK): 13.8
CTE 25°C–600°C (µm/mK): 14.0
Soldering before firing: Orplid Ceramic solder 1050
Soldering after firing: Orplid solder 760
Vickers hardness (HV 5/30): w: 200
a: 240
g/b: 190/200
0.2% proof stress (MPa): w: 470
a: 580
g/b: 490/490
Elongation at break (%): w: 7
a: 3
g/b: 11/11
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: 1370-1420 °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 110 µm aluminium oxide. Pressure should not exceed 2 bar
Cleaning: Steam jet cleaning or in the ultrasound device
Oxide firing: 5 mins at 930°C without vacuum. 
Soldering before firing: Orplid Ceramic solder 1050
Soldering after firing: Orplid solder 760
Firing: For normally expanding ceramic materials with a firing temperature of up to 1050°C