 #909
Alloy
Thank you for using UNITED'S alloys.
UNITED'S 909 ALLOY may be used for 14 or 18K white gold castings
and will produce a white finished color. #909 contains a boron
deoxidizer.
You should obtain excellent results by following a few simple
instructions.
MELTING
| Melt Temperature for 14-18K Alloyed Grain |
1040°-1050° C |
1904°-1922° F |
| Melt Temperature for Alloying |
1090°-1100° C |
1994°-2012° F |
We do recommend pre-graining all alloy and fine gold before
casting to assure a uniform mixture.
FLASK TEMPERATURE
We suggest a slightly higher flask temperature 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
10 - 15 minutes
INVESTMENT REMOVAL
Most standard investment removers will successfully remove the
investment powder. UNITED'S Brite-Cast Investment Remover also works
very well.
REMELTING
We recommend a 70% fresh - 30% scrap mix. 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.
TECHNICAL ASSISTANCE
Always available…
Call 1-800-999-3463 / 1-800-999-FINE
E-mail / doc@unitedpmr.com
Web-Site / www.unitedpmr.com |