| Purpose |
-
Mix Alloy #940 with fine gold to obtain 10K
or 14K White Gold for casting.
-
#940 contains a silicon deoxidizer.
|
| Melting |
-
For 10K Alloyed Grain: 1030°-1040°C,
1886°-1904°F.
-
For 14K Alloyed Grain: 1000°-1010°C,
1832°-1850°F.
-
Melt Temperature for Alloying: 1050°-1060°C,
1922°-1940°F.
-
Pre-graining is recommended for all alloy
and fine gold before casting to assure a uniform mixture.
|
| Flask Temperature |
-
A slightly higher flask temperature
is recommended for white gold.
|
| Fluxing |
-
Fluxing white gold is extremely important
to pick-up oxides.
-
Boric Acid is the recommended flux. Do not
use carbon fluxes or any fluxes designed for refining; i.e. soda ash, saltpeter,
etc.
-
Avoid flux in bottom pour automatic casting
units.
|
| Quench Time |
|
| Investment Removal |
-
Most standard investment removers will successfully
remove the investment powder. Fluoric-based investment removers are the
best for removing the silicon oxide invisible coating.
|
| Re-Melting |
-
70% fresh - 30% scrap mix is recommended.
-
White gold alloy has about 1/3 the reusability
of yellow gold alloys.
|
| Notes |
-
Melt temperature may vary with type of unit.
-
This alloy is designed for casting only.
|
