Description
| Type: | Goldreduzierte Gusslegierung Typ 4 (extrahart)
gem. DIN EN ISO8891 |
| Colour: | white |
| Applicable scope: | ||
| ● Brücken | ||
| ● Fräs-, Steg- und Geschiebearbeiten | ||
| ● Kronen |
| Composition: | Au | 3,0 | ||
| (mass fraction in %) | Pd | 30,0 | ||
| Ag | 55,5 | |||
| Zn | 1,5 | |||
| Cu | 10,0 |
| Technical specifications: | Density in g/cm³ | 11,1 | |||
| Vickers hardness HV 5/30 | as modeling alloy | (s) 175 | |||
| Yield strength Rp0,2 in MPa | as modeling alloy | (s) 450 | |||
| Elongation at break in % | as modeling alloy | (s) 16 | |||
| Zugfestigkeit Rm MPa | as modeling alloy | (s) 600 | |||
| Elastic modulus in GPa | 100 | ||||
| Melting interval in °C | 950 – 1040 |
| Processing: | Preheating temp. of the casting moulds in °C | 700 |
| Casting temperature in °C | 1140 | |
| Crucibles | Graphite/ceramic | |
| Curing | self-curing |
| Suitable solders: | Joints before ceramic firing | AL 800 |
| Joints after ceramic firing | AL 750 |
1) Brief description:
s – self-curing, n – after ceramic firing, a-s – curing from s condition
a-n – curing from n condition
2) All information about cured condition is given according to the alloy:
– Oxide firing 10min/ 960°C + 4x4min/ 960°C for yellow conventional bonding alloys
– Oxide firing 10min/ 980°C + 4x4min/ 980°C for white conventional bonding alloys
– Oxide firing 10min/ 800°C + 4x4min/ 800°C for LFC-systems
Corresponding data are true under these conditions only.
3) The ceramic firing should be carried out according to the manufacturer's instructions.

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