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Harmony® 3

Ag (50.8%)-based dental casting alloy, Type 4

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Harmony 3 is a silver and palladium-based casting alloy. Its high strength and low density make it an economical alternative to base metal alloys.

Indications*

  • Onlays, ¾ crowns, crowns
  • Telescope crowns, conus crowns
  • Bridges
  • Wide-span bridges
  • Cast posts / cores, bars, attachments

Technical Data

Composition (%):  Ag 50.8 | Pd 25.9 | Cu 13.8 | Sn 4.5 | Au 3.5 | Zn 1.2 | Mn <1.0, Re <1.0
ISO  22674:2016
ADA Type Noble
Type / Color 4 / White
Density (g/cm³) 10.6
Melting Range (Solidus/Liquidus): 880 - 960 °C
Elastic Modulus (GPa): 106
  As Cast              Softened        Hardened 
Vickers Hardness: 230                      200                  245
Tensile Strength (MPa): 610                      520                  645
0.2% Proof Stress (MPa):  430                      350                  525
Elongation (%): 10                        10                     5

Advantages

  • High strength
  • Economical due to low density
  • Excellent processing properties
  • Excellent polishing properties
  • Veneering with laboratory composites (e.g. SR Nexco)

Processing Data

Investment Material:  Phosphate-bonded / Gypsum-bonded
Preheating / Burn- out Temperature: 650 - 705 °C
Crucible  Carbon crucible / Ceramic crucible
Casting Temperature: 1020 - 1050 °C
Recommended Lab Composite: SR Nexco
Laser Welding Wire: Laser C&B White

*See TYPE CLASSIFICATION DUE TO PHYSICAL PROPERTIES

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