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940 Medium White Casting Master Alloy for 10-14K - 1 oz.
Our Price:
$
7.25
Product Code:
UN940
Qty:
Description
Instructions
940 White Casting Master Alloy for 10-14K White Gold - 1 oz. (28 grams). Mix alloy #940 with fine gold to obtain 10K or 14K white gold for casting. Contains a silicon de-oxidizer.
No gold content
Purpose
Mix alloy #940 with fine gold to botain 10K or 14K white gold for casting.
#940 alloy contains a silicon de-oxidizer.
Melting
For 10K Alloyed Grain: 1030°-1040°C / 1886°-1904°F.
For 14K Alloyed Grain: 1000°-1010°C / 1832°-1850°F.
Melt Temperature for Alloying: 1050°-1060°C / 1922°-1940°F.
Pre-graining is recommended for all alloy and fine gold before casting to assure a uniform mixture.
Flask Temperature
A slightly higher flask temperature is recommended for white gold.
Fluxing
Fluxing white gold is extremely important to pick up oxides.
Boracic 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
10-12 minutes.
Investment Removal
Most standard investment removers will successfully remove the investment powder. Flouric-based investment removers are the best for removing the silicon oxide invisible coating.
Re-Melting
70% fresh - 30% scrap mix is recommended.
White gold alloy has about 1/3 the re-usability of yellow gold alloys.
Notes
Melt temperature may vary with type of unit.
This alloy is designed for casting only.
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