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915 Whitest Casting Alloy - 30% Nickel
1 oz. (28 grams).
Our Price:
$
7.25
Product Code:
915-WHITE-CASTING
Qty:
Description
Instructions
#915 Whitest Casting Alloy - 1 oz. (28 grams). Mix alloy #915 with fine gold to obtain 10K to 18K white gold for casting. Contains a silicon de-oxidizer and a high nickel content.
#915 White Casting Alloy
Purpose
Mix Alloy #915 with fine gold to obtain 10K to 18K white gold for casting.
Contains a silicon de-oxidizer, and a high nickel content.
Melting
For 10K Alloyed Grain: 1050° -1060°C / 1922°-1940°F.
For 14K/18K Alloyed Grain: 1030°-1040°C / 1886°-1904°F.
Melt Temperature for Alloying: 1060°-1070°C / 1940°-1958°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 refning; ie. soda ash, saltpeter, etc.
Avoid flux in bottom pour automatic casting units.
Quench Time
8 to 12 minutes.
Investment Removal
Most standard investment removers will successfully remove the investment powder. Flouric-based investment removers are the best for removning 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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