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recommended procedure
WAXING:8-10 gauge sprues, direct casting for single units and indirect method for multiple units.
INVESTING: Any carbon free high heat investment is recommended. Use non-asbestos ring liner. Bench set 1 1/2 Hrs. Place in cold furnace and gradually bring up to 1650°F. Hold for 1 1/2 hrs.
CASTING: High Heat quartz crucibles are recommended, along with a multi?orifice torch, using a gas/oxygen mixture or in an electric induction casting machine. When the ingots completely slump the alloy is then ready to be cast. After casting, bench cool to room temperature.
FINISHING: Grind the metal with non?contaminated aluminum oxide stones. After grinding, blast with non?recycled 50 micron aluminum oxide, and clean in distilled water in ultrasonic cleaner for ten minutes.
DEGASSING: Place the castings in the furnace at 1200°F (650°C) and raise to 1800°F (980°C) with full vacuum. No hold. Remove of oxide is optional.
OPAQUE: Apply opaque wash and bake. Then full opaque coat and bake.
major components
NICKEL = 76.0% NOMINAL
CHROME = 12.0% NOMINAL
MOLYBDENUM = 4.65% NOMINAL
BERYLLIUM = 1.8% NOMINAL
physical properties
Coefficient of Expansion, @ 500C= 14.1 x 10
Elongation = 16%
Ultimate Strength = 76,000 psi
Yield Strength = 40,000 psi
Brinnel Hardness = 225
Casting Temperature = 2400°F-2450°F
CAUTION: Persons with known nickel sensitivity should avoid using this alloy. Dust can be toxic. Grind and polish in well-ventilated area.
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