Composition:
Palladium 25%
Silver 70%
Indium 3%
Zinc 2%
Balance Ir
Color: White
Applications: PIEDMONT 70 is a Type III, white colored, hard cast palladium/silver dental casting alloy. It is designed for use in crowns, inlays, veneer crowns, 3/4 crowns and short span bridgework.
Physical Properites:
| Casting Temperature | 2150F (1180C) |
| Melting Range | 1870-2010F (1020-1100C) |
| Density (gm/cc) | 10.5 |
| Vickers Hardness | Q-145, H-155 |
| Tensile Strength | Q-63,000 psi, H-68,000 psi |
| Yield Strength | Q-38,000 psi, H=48,000 psi |
| Elastic Modulus | 14,000,000 psi |
| Elongation(%) | Q-10, H-8 |
Recommended Processing:
| Recomended Solders | 585 |
| Recommended Investment | PB |
Spruing:
Single units - Direct method with 8 ga. sprues and adequate resevoirs.
Multiple Units - Indirect Method with runner bars and 8 ga. sprues.
Investment: Use a high-heat phosphate-bonded investment following the manufacturer's instructions.
Burnout: After adequate set-up time, place ring(s) in oven at room temperature and raise temperature to 1350F (730C) and hold for 1 hour. Add ten minutes for each additional ring.
Melting and Casting: PIEDMONT 70 has a casting temperature of 2150F(1180C). An air/gas torch with multiorifice tip and a white flux are recommended. Clean buttons may be remelted with 50% addition of new alloy. Do not overheat the alloy.
Preparing Framework: Cassting may be blasted using aluminum oxide. PIEDMONT 70 may be heat hardened in a furnace at 750F (400C). Soak for 15 minutes and allow to bench cool.
Soldering:Use 585 solder with a paste flux and an air/gas torch.
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