United
Precious Metal Refining, Inc.
V.H.F. Series Alloys
Thank you for using UNITED'S alloys.
UNITED'S "V.H.F." SERIES ALLOYS are designed for very high
fluidity 10K & 14K yellow gold casting. The "V.H.F." alloys are
ideal for use in gemstones set in wax casting, using cooler flask,
and casting temperatures. "V.H.F." alloys work well in automatic,
small hole, vacuum assist casting machines.
You should obtain excellent results by following a few simple
instructions.
MELTING
| Melt Temperature for 14K Alloyed Grain |
930°- 960°C |
1710°-1760°F |
| Melt Temperature for 10K Alloyed Grain |
950°- 990°C |
1750°-1815°F |
| Melt Temperature for Alloying |
1000°- 1030°C |
1832°- 1886°F |
We do recommend pre-graining all alloy and fine gold before casting
to assure a uniform mixture.
FLASK TEMPERATURE
Normal recommended temperature.
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 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 a 50% fresh mix for remelting unless our #99 Alloy
Replenisher is used.
NOTES
Melt temperature may vary with type of unit. This alloy is designed
for casting.
TECHNICAL ASSISTANCE
Always available…
Call 1-800-999-3463 / 1-800-999-FINE
E-mail / doc@unitedpmr.com
Web-Site / www.unitedpmr.com |