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recommended procedure
WAXING: 10 gauge sprues, direct spruing O.K.
INVESTING: Any recommended heat investment. Line rings, bench set 1-1 1/2 hrs. Place in cold furnace. Run up to 1600°F 1-1 1/2 hrs.
CASTING: Use high heat crucibles and multi?orifice torch. Oxygen (15 psi) and gas. Heat crucible prior to casting and wind casting machine, 1 - 2 extra turns. Hold torch so center cone of flame is concentrated on metal. Casting range 2350°-2450°F When metal slumps RELEASE, bench cool 10 min. and quench.
PREPARATION: Do not use acid. After case is fitted blast it aluminum oxide compound, OR go over surface with carbide. Place in ultrasonic with rubbing alcohol for 5 min. Wash thoroughly with tap water.
OPAQUE: No degassing or conditioner necessary. Apply opaque wash and bake. Then full opaque coat and bake.
FOLLOW YOUR NORMAL PORCELAIN TECHNIQUE
major components
NICKEL = 70.0% NOMINAL
CHROME = 16.37% NOMINAL
MOLYBDENUM = 8.0% NOMINAL
BERYLLIUM = 1.9% NOMINAL
physical properties
Coefficient of Expansion, @ 500°C = 13.64 x 106
Brinnel Hardness = 228
Elongation = 11%
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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