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
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