AURUMED Auruloy GF

Type 4
white 
copper-free

Composition: Pd 56.0 / Ag 32.0 / Sn 8.8 / Ga 2.0 / In 1.0 /
Ru 0.2 
Standard: DIN EN ISO 22674 and DIN EN ISO 9693
Colour: white
Melting range °C: 1205–1070
Soft annealing: 15 mins at 900 °C / quench in water
Hardening: 15 mins at 600 °C / air
Preheating temperature °C: 900
Casting temperature °C: 1355
Further heating after melting (secs): electr.: 20–30
inductive: 5–10
flame: 5–10
Density g/cm3: 11.2
CTE 25°C–500°C (µm/mK): 14.4
CTE 25°C–600°C (µm/mK): 14.4
Soldering before firing: Cehadentor Ceramic solder 1050
Soldering after firing: Orplid solders 760
Vickers hardness (HV 5/30): w: 240
a: 280
g/b: 270/250
0.2% proof stress (MPa): w: 452
a: 525
g/b: 500/476
Elongation at break (%): w: 16
a: 11
g/b: 10/13
Spruing: Following the rules for dental applications (see General Instructions for Use)
Investment: Phosphate-bonded investment materials
Preheating: 900 °C, 30 to 90 mins until end temperature, depending on size of mould
Casting: 1355 °C, possibly increase by 20°C–30°C for resistance-heated vacuum pressure casting. 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: 10 mins at 960°C without vacuum
Soldering before firing: Cehadentor Ceramic solder 1050
Soldering after firing: Orplid solders 760
Firing: For normally expanding ceramic materials