 #396
Alloy
Thank you for using UNITED'S alloys.
UNITED’S 396 ALLOY is designed for 18K – 22K yellow gold casting,
which produces a pink color in 18K, and a reddish yellow color in
20K – 22K.
You should obtain excellent results by following a few simple
instructions.
MELTING
| Melt Temperature for 18K Alloyed Grain |
1010° - 1020° C |
1850° - 1868° F |
| Melt Temperature for 20K-22K Alloyed Grain |
1090° - 1120° C |
1994° - 2048° F |
| Melt Temperature for Alloying 18K |
1060° - 1070° C |
1940° - 1958° F |
| Melt Temperature for Alloying 20K-22K |
1080° - 1100° C |
1976° - 2012° F |
We do recommend pre-graining all alloy and fine gold before
casting to assure a uniform mixture.
FLASK TEMPERATURE
| For 18K |
use normal recommended temperature |
| For 20K-22K Vacuum casting |
676° - 730° C |
1250° - 1350° F |
| For 20K-22K Centrifugal casting |
537° - 565° C |
1000° - 1050° F |
FLUXING
Boric Acid is the recommended flux. Use as little flux as
possible. 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
For 20K-22K 15-20 minutes. For 18K quench 3-5
minutes.
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. Our Brite-Cast Investment Remover also works very well.
REMELTING
We recommend 50% rejuvenation for remelting.
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 |