Premium White 9–18 Silicon Free Casting Master Alloy is a professional-grade white gold master alloy formulated for both casting and fabrication applications. Sold by the troy ounce (20 pennyweights / 31.1 grams), this alloy contains no gold and is designed to be pre-alloyed with fine gold to produce white gold alloys from 9K through 18K. The formulation is noted as silicon free in its designation, though the manufacturer notes that proprietary metals, silicon, and deoxidizers may be present in the full composition.
| Composition | Cu 55%, Zn 20%, Ni 25% (plus proprietary metals; may also contain silicon and deoxidizers) |
|---|---|
| Contains Gold | No |
| Sold By | Troy ounce (20 pennyweights / 31.1 grams) |
| Compatible Karat Range | 9K – 18K white gold |
| Pre-Alloying Temp (10K) | 1100°C – 1120°C / 2012°F – 2048°F |
| Pre-Alloying Temp (14K–18K) | 1050°C – 1070°C / 1922°F – 1958°F |
| Casting Temp (10K) | 1095°C – 1115°C / 2003°F – 2039°F |
| Casting Temp (14K) | 995°C – 1015°C / 1823°F – 1859°F |
| Casting Temp (18K) | 985°C – 1005°C / 1805°F – 1841°F |
| Flask Temperature | 540°C – 675°C / 1004°F – 1247°F (varies by flask size, karat, and jewelry type) |
| Quench Time | 20–30 minutes |
| Recommended Flux | Boric acid |
Melt temperature may vary depending on the type of casting unit used. Fluxing is extremely important when working with white gold to ensure proper oxide pickup. The composition listed reflects the primary declared metals; proprietary metals and processing aids may also be present. Confirm all technical parameters are appropriate for your specific equipment and application before use.
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