Econolloy Au

Type 4
pale yellow / Au 33.0 
copper-free

Data Sheet
Safety Data Sheet​​​​​​​
 

 

Composition: Au 33.0 / Pt 1.0 / Ag 43.0 / Pd 14,8 / In 8.0 /
Ir 0.1 / Nb 0.1
Standard: DIN EN ISO 22674 and DIN EN ISO 9693
Colour: pale yellow
Melting range °C: 1060–1010
Soft annealing: 15 mins at 800 °C / quench in water
Hardening: 15 mins at 550 °C 
Preheating temperature °C: 800
Casting temperature °C: 1250°C 
Further heating after melting (secs): electr.: 30
inductive: 5–10
flame: 5–10
Density g/cm3: 12.7
CTE 25°C–500°C (µm/mK): 17.2
CTE 25°C–600°C (µm/mK): 17.6
Soldering before firing: Orplid Ceramic solder CF 950
Soldering after firing: Orplid solder CF 720
Vickers hardness (HV 5/30): w: 160
a: 230
g/b: 185/190
0.2% proof stress (MPa): w: 360
a: 575
g/b: 410/480
Elongation at break (%): w: 6
a: 2
g/b: 4/4
Spruing: Following the rules for dental applications (see General Instructions for Use)
Investment: Phosphate-bonded investment materials
Preheating: 800 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting: 1250°C – possibly increase by 20°C–30°C for resistance-heated casting units. graphite crucible or with open fl ame 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 ba
Cleaning: ultrasonic cleaning or steaming with steam device
Oxide firing: 5 mins at 800°C without vacuum. 
Soldering before firing: Orplid Ceramic solder CF 950
Soldering after firing: Orplid solder CF 720
Firing: For highly expanding ceramic materials max. 910 °C