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ARRO ROSENSON
PREMIUM DENTAL PRODUCTS. Call: 1-800-666-2776

Aro-Shot

It is easily cast & polished to a high luster finish. Can be melted with an oxygen-acetylene torch and in an electric casting machine. Economical and excellent material for casting partial.

MAJOR COMPONENTS
 
Chrome Cobalt Partial Alloy Nickel & Beryllium Free
COBALT = 64.00% NOMINAL 
CHROMIUM = 28.00% NOMINAL
MOLYBDENUM = 6.00% NOMINAL 
MANGANESE = < 1.00% 
IRON: = < 1.00% 

SILICON = < 1.00%
CARBON = < 1.00%

PHYSICAL PROPERTIES OF ARO CHROME COBALT PARTIAL ALLOY

NICKEL & BERYLLIUM FREE
Melting Range = 2370-2500°F (1300-1370°C)
Casting Temperature = 2750°F (1510°C)
Density = 8.3 g/cm3
Yield Strength = 80,000 psi (552 MPa)
Elastic Modulus : 228 GPa
Elongation : 10%
Vickers Hardness = 380

INDICATIONS FOR USE:

ARO is a Cobalt — Chromium based alloy
acceptable for use in fabrication of dental prosthetics
and reconstructions. Rx Only
 
 
TECHNICAL INSTRUCTIONS

MODELING: Commercially made plastic patterns are availatvle for most
of the framework.

SPHUING: Sprue through a hole centrally located in the mold. Location
and amount of sprues are at discretion of lab technician. It is advisable to
join together tips of the clasp to help prevent incomplete casting.

INVESTING: After wax model is completed. invest the ring with partial
investment following manufacturers recommended instructions. if you
are using a rapid-fire investment. follow the manufacturers instructions.

BUFINOUT:
Recommended cycle:
1. Start-up at 750-B50°F (4DO»455°C)
2. After 1 hour increase to 2000°F (1095°C)
3. Hold at 20D0°F (1D95"C) for 1 hour.
4. Use spacers under the ring.

Note: The process above is recommended. Each investment is unique,
please review investment manufacture instructions.

CASTING: Use induction or torch casting. when using the oxy-acetylene
torch, equipped with no. 4 or no. 6 tip, adjust the flame with inner core
between 1/2 inch and 1 inch (12mm - 24mm) long. Do not hold torch too
close to the alloy. Cast when the metal slumps. Do not overheat the alloy.
Do not pull the torch away from the metal when casting. After casting,
allow the ring to bench cool.

FINISHING: Sandblast casting thoroughly to remove all evidence of
investment particles and oxide suflace. Finish with appropriate stones
and E|ectro<polish as per manufacturers recommended instructions.

SOLDERING: Use: Co/Cr Pre