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Description
Wironium® Extrahart
The ideal partial denture alloy for combination work.
Advantages
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 emphasizes the wearing comfort of the prosthesis
Biocompatible and corrosion-resistant
Wironium® Extrahart Specifications
COMPOSITION IN % BY MASS
Co 63.0 · Cr 30.0 · Mo 5.0 · Si 1.0 · Mn 1.0 · C
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
Elongation after fracture (A5) 8%
Vickers hardness 385 HV10
AVAILABILITY CONTENTS REF
Wironit® extrahart 1000 g 50060
ACCESSORIES CONTENTS REF
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Wiroweld CoCr laser wire, carbon-free, Ø 0.5 mm 1.5 m – 2 g 50005
Cobalt-Chrome solder 4g 52520
