 #520
Alloy
Thank you for using UNITED'S alloys.
UNITED'S #520 ALLOY may be used for 10K - 18K casting, which
produces a Russian red, or reddish yellow finished color.
You should obtain excellent results by following a few simple
instructions.
MELTING
| Melt Temperature for 10 & 14K Alloyed Grain |
970°- 980°C |
1778°-1796°F |
| Melt Temperature for 18K Alloyed Grain |
1000°- 1010°C |
1832°-1850°F |
| Melt Temperature for Alloying |
1040°- 1050°C |
1904°- 1922°F |
We do recommend pre-graining all alloy and fine gold before
casting to assure a uniform mixture.
FLASK TEMPERATURE
Normal recommended temperature. Use slightly higher for 18K.
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
15 - 20 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. UNITED'S 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 |