XL-X

Au (62.8%)-based dental casting alloy, Type 4
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XL-X is a gold-reduced, low-density casting alloy for economical use. Its composition gives this alloy a golden yellow colour and allows for a wide range of indications.

Indications*

  • Onlays, ¾ crowns, crowns
  • Telescope crowns, conus crowns
  • Bridges
  • Wide-span bridges
  • Cast posts / cores, bars, attachments
  • Implant-supported superstructures
  • Partial dentures

Technical Data

Composition (%):  Au 62.8 | Pd 3.9| Ag 16.1 | Cu 15.7 | Zn 1.0 | In <1.0 | Ir <1.0
ISO  22674:2016
ADA Type High Noble
Type / Color 4 / Yellow
Density (g/cm³) 13.9
Melting Range (Solidus/Liquidus): 870 - 910 °C
Elastic Modulus (GPa): 105
  As Cast              Softened        Hardened 
Vickers Hardness: 270                      165                  300
Tensile Strength (MPa): 790                      510                  840
0.2% Proof Stress (MPa):  690                      385                  740
Elongation (%): 13                        40                    14

Advantages

  • Golden yellow colour
  • Economical use due to low density
  • Wide range of indications
  • Veneering with laboratory composites (e.g. SR Nexco)
  • Tested biocompatibility

Processing Data

Investment Material:  Phosphate-bonded / Gypsum-bonded
Preheating / Burn- out Temperature: 650 - 760 °C
Crucible  Carbon crucible / Ceramic crucible
Casting Temperature: 965 - 1025 °C
Recommended Lab Composite: SR Nexco
Laser Welding Wire: Laser C&B Yellow

*See TYPE CLASSIFICATION DUE TO PHYSICAL PROPERTIES

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