Wironit® extrahart

The ideal partial denture alloy for combination work

  • Due to its high proof strength and ultimate strength, this alloy is ideally suited for combination work
  • Outstanding casting properties thanks to the special composition with silicon and carbon
  • Very low thermal conductivity of the alloy emphasises the wearing comfort of the prosthesis
  • Biocompatible and corrosion-resistant
Alloy characteristics Standard values
Type (ISO 22674) 5
Density 8.2 g/cm3
Preheating temperature 950–1050 °C
Solidus, liquidus temperature 1260, 1390 °C
Casting temperature approx. 1420 °C
Young’s modulus 185 GPa
Proof strength (Rp0.2) 635 MPa
Ultimate strength (Rm) 900 MPa
Elongation after fracture (A5) 8%
Vickers hardness 385 HV10
Composition in % by mass
Co 63.0 · Cr 30.0 · Mo 5.0 · Si 1.0 · Mn 1.0 · C
Availability REF
Wironit® extrahart, 1pack = 1000 g 50060
Accessories REF
Ø 0.5 mm, 1 pack = 1.5 m – 2 g 50005
Cobalt-chrome solder, 1 pack = 4 g 52520

Contact / Service

BEGO USA Inc.
24 Albion Road
Suite 103
Lincoln, RI 02865

Phone: 800 342 2346
Cell: 774 571-0395
Fax: 401 334-9265
E-Mail: info@begousa.com