Biorplid G1

Type 4
yellow / Au 72.0
palladium-free

Composition: Au 72.0 / Zn 0.8 / Ag 13.7 / Cu 9.8 / Ir 0.1 / Pt 3.6
Standard: DIN EN ISO 22674
Colour: yellow
Melting range °C: 945–895
Soft annealing: 15 mins at 750 °C/ quench in water
Hardening: 30 mins at 300 °C/ air
Preheating temperature °C: 700
Casting temperature °C: 1095
Further heating after melting: (secs): elektr.: 15–20
inductive: 5–10
flame: 5–10
Density g/cm3: 15.4
Solders: Orplid solders 825, 790, 760
Vickers hardness (HV 5/30): w: 150
a: 260
g/b: 220
0.2% proof stress (MPa): w: 260
a: 525
g/b: 520
Elongation at break (%): w: 43
a: 19
g/b: 18
Spruing: Following the rules for dental applications (see General Instructions for Use)
Investment: Phosphate-bonded investment materials (for example Cehacast Speed)
Preheating: 700 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting: 1095 °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
Cleaning: Ultrasonic cleaning or steam jet cleaning
Soldering: Orplid solders 825, 790, 760