{"product_id":"ultra-white-9k-18k-stone-in-place-nickel-casting-master-alloy","title":"Ultra White 9K-18K Stone-In-Place Nickel Alloy","description":"\u003cp\u003eUltra White 9K–18K Stone-In-Place Investment Casting Master Alloy is formulated for excellent fluidity during casting and fabrication applications. \u003cstrong\u003eContains no gold.\u003c\/strong\u003e Sold by the troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for stone-in-place investment casting with excellent metal fluidity\u003c\/li\u003e\n\u003cli\u003eCompatible with 9K through 18K gold formulations when pre-alloyed with fine gold\u003c\/li\u003e\n\u003cli\u003eSuitable for both casting and fabrication applications\u003c\/li\u003e\n\u003cli\u003eContains no gold — a true master alloy for alloying to karat\u003c\/li\u003e\n\u003cli\u003eGypsum bonded investment recommended for best results\u003c\/li\u003e\n\u003cli\u003eFluoride-based investment removers recommended for silicon oxide coating removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eCu 53%, Ag 20%, Zn 10%, Ni 17% (plus proprietary metals; may also contain silicon and deoxidizers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContains Gold\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePre-Alloying Temperature (9K–18K)\u003c\/th\u003e\n\u003ctd\u003e1050°C – 1060°C \/ 1922°F – 1940°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp – 10K Alloyed Grain\u003c\/th\u003e\n\u003ctd\u003e960°C – 980°C \/ 1760°F – 1796°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp – 14K Alloyed Grain\u003c\/th\u003e\n\u003ctd\u003e985°C – 1005°C \/ 1805°F – 1841°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp – 18K Alloyed Grain\u003c\/th\u003e\n\u003ctd\u003e980°C – 1000°C \/ 1796°F – 1832°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlask Temperature\u003c\/th\u003e\n\u003ctd\u003e540°C – 675°C \/ 1004°F – 1247°F (varies by flask size, karat, and jewelry type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuench Time\u003c\/th\u003e\n\u003ctd\u003e15–25 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePre-alloying with fine gold using aggressive stirring and fluxing is recommended to ensure a uniform mixture.\u003c\/li\u003e\n\u003cli\u003eUse very little boric acid flux. Do not use carbon flux such as soda ash or saltpeter. No flux is needed in a bottom-pour automatic casting unit.\u003c\/li\u003e\n\u003cli\u003eTo calculate the weight of metal needed (in grams), multiply density (g\/cc) by the weight of wax (grams), then add 10% for the button.\u003c\/li\u003e\n\u003cli\u003eAvoid aggressive acids for investment removal — use fluoride-based removers to prevent stress corrosion and surface damage.\u003c\/li\u003e\n\u003cli\u003eRecommended scrap mix: 60% fresh, 40% scrap. Note that white gold alloy has approximately one-third the reusability of yellow gold alloys.\u003c\/li\u003e\n\u003cli\u003eMelt temperature may vary depending on the type of casting unit used.\u003c\/li\u003e\n\u003cli\u003eProprietary metals are present in the formulation and are not fully disclosed in the composition data.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245843247318,"sku":"846-982","price":39.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ultra-white-9k-18k-stone-in-place-nickel-alloy-otto-frei.jpg?v=1726697575","url":"https:\/\/www.ottofrei.com\/products\/ultra-white-9k-18k-stone-in-place-nickel-casting-master-alloy","provider":"Otto Frei","version":"1.0","type":"link"}