White 9-18 Investment Casting Master Alloy-Per Troy Ounce (20DWT)

This white alloy is nickel based and contains copper, nickel and zinc.  Recommended for investment casting and fabrication. Previously called White Century.  Sold by the Troy Ounce (20 pennyweight/31.1 grams). Content: Cu 57.7% Zn 18.1% Ni  24.2%   Note: There are proprietary metals in the formulation which are not included in the composition section.   846-100 nickel based white alloy is specially formulated for peak performance in enclosed or automated casting equipment. This alloy may be used for 9 K – 18 K white gold casting, which produces a White finished color. This alloy contains a small amount of silicon as a deoxidizer. You should obtain excellent results by following a few simple instructions. We do recommend pre-alloying all alloy and fine gold with aggressive stirring & fluxing to assure a uniform mixture.   Step : 1  Pre- Alloying (Fine gold + alloy) Temperature 1050C - 1060C / 1922F - 1940F Step : 2 Casting Temperature for 9 K – 10 K Alloyed Grain 1030C - 1040C  / 1886F - 1904F Casting Temperature for 14 K – 18 K Alloyed Grain 1000C - 1020C  / 1832F - 1868F   NOTES: Melt temperature may vary with type of unit. This alloy is designed for casting and fabrication application.   Flask Temperature: Normal recommended temperature in the range of 580 C to 700 C / 1076° F – 1292° F depending on size of flask, karat & type of jewelry. Fluxing white gold is extremely important to pick-up oxides. Boric 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 – 15 minutes. Investment Removal: Most standard investment removers will successfully remove the investment powder. Use of aggressive acids causes stress corrosion and surface damage and is therefore not recommended.   Removal: We recommend a 70% fresh - 30% scrap mix. White gold alloy has about 1/3 the reusability of yellow gold alloys.