#790 Alloy

Thank you for using UNITED'S alloys.

UNITED'S 790 ALLOY is designed for 18K yellow gold casting, which produces a deep yellow color.

You should obtain excellent results by following a few simple instructions.

MELTING

We do recommend pre-graining all alloy and fine gold before casting to assure a uniform mixture.

FLASK TEMPERATURE
We recommend a slightly higher flask temperature 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