Ultra White 9-18 Investment Casting Master Alloy

Ultra White 9-18 Investment Casting Master Alloy-Contains No Gold-Per Troy Ounce (20DWT) Contains: CU 57% Zn 21% Ni 22% Note: There are proprietary metals in the formulation which are not included in the composition section.  May also contain silicon and deoxidizers. Sold by the troy ounce (20 pennyweights or 31.1 grams).   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 10K  1060C - 1080C / 1940F - 1976F Pre- Alloying (Fine gold + alloy) Temperature 14K-18K  1050C - 1060C / 1922F - 1940F Step : 2 Casting Temperature for 10K Alloyed Grain 1055C - 1075C  / 1931F - 1967F Casting Temperature for 14K Alloyed Grain 1015C - 1035C  / 1859F - 1895F Casting Temperature for 18K Alloyed Grain  990C - 1010C  / 1814F - 1850F   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 540 C to 675 C / 1004° F – 1247° 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 – 12 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.