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Ultra White 9K-18K Stone-In-Place Nickel Alloy - Otto Frei
Otto Frei

Ultra White 9K-18K Stone-In-Place Nickel Alloy

Part # 846-982 4 In Stock Weight <0.1 lb / <5 g
$39.05

Availability Sold out

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Description

Ultra White 9K–18K Stone-In-Place Investment Casting Master Alloy is formulated for excellent fluidity during casting and fabrication applications. Contains no gold. Sold by the troy ounce (20 pennyweights / 31.1 grams).

Features

  • Engineered for stone-in-place investment casting with excellent metal fluidity
  • Compatible with 9K through 18K gold formulations when pre-alloyed with fine gold
  • Suitable for both casting and fabrication applications
  • Contains no gold — a true master alloy for alloying to karat
  • Gypsum bonded investment recommended for best results
  • Fluoride-based investment removers recommended for silicon oxide coating removal

Specifications

Composition Cu 53%, Ag 20%, Zn 10%, Ni 17% (plus proprietary metals; may also contain silicon and deoxidizers)
Contains Gold No
Sold By Troy ounce (20 pennyweights / 31.1 grams)
Pre-Alloying Temperature (9K–18K) 1050°C – 1060°C / 1922°F – 1940°F
Casting Temp – 10K Alloyed Grain 960°C – 980°C / 1760°F – 1796°F
Casting Temp – 14K Alloyed Grain 985°C – 1005°C / 1805°F – 1841°F
Casting Temp – 18K Alloyed Grain 980°C – 1000°C / 1796°F – 1832°F
Flask Temperature 540°C – 675°C / 1004°F – 1247°F (varies by flask size, karat, and jewelry type)
Quench Time 15–25 minutes

Notes

  • Pre-alloying with fine gold using aggressive stirring and fluxing is recommended to ensure a uniform mixture.
  • Use 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.
  • To calculate the weight of metal needed (in grams), multiply density (g/cc) by the weight of wax (grams), then add 10% for the button.
  • Avoid aggressive acids for investment removal — use fluoride-based removers to prevent stress corrosion and surface damage.
  • Recommended scrap mix: 60% fresh, 40% scrap. Note that white gold alloy has approximately one-third the reusability of yellow gold alloys.
  • Melt temperature may vary depending on the type of casting unit used.
  • Proprietary metals are present in the formulation and are not fully disclosed in the composition data.

Specifications

Brand
Otto Frei
Part #
846-982
Type
Alloys
Dimensions
2 in x 2 in x 0.5 in
Composition
Cu 53%, Ag 20%, Zn 10%, Ni 17% (plus proprietary metals; may also contain silicon and deoxidizers)
Contains Gold
No
Sold By
Troy ounce (20 pennyweights / 31.1 grams)
Pre-Alloying Temperature (9K–18K)
1050°C – 1060°C / 1922°F – 1940°F
Casting Temp – 10K Alloyed Grain
960°C – 980°C / 1760°F – 1796°F
Casting Temp – 14K Alloyed Grain
985°C – 1005°C / 1805°F – 1841°F
Casting Temp – 18K Alloyed Grain
980°C – 1000°C / 1796°F – 1832°F
Flask Temperature
540°C – 675°C / 1004°F – 1247°F (varies by flask size, karat, and jewelry type)
Quench Time
15–25 minutes

Documents

Specs, manuals, and certificates for this product. All files open in a new tab.

Casting Alloys, Solders and Precious Metals Safety Data Sheet SDS · 282 KB · 12 pages
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.

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