Wirobond® SG

Cobalt-chrome metal-ceramic alloy

  • Nickel-and beryllium-free
  • Reliable use even in problematic cases and restorations with large bridge spans 
  • Simple and reliable casting time recognition thanks to optimal silicon content
  • Normal cooling facilitates economical and effective working
  • Reliable metal-ceramic bond with no need for an additional, expensive bonder 
  • Biocompatible and corrosion-resistant
Safe dimensions in the non-precious metal-ceramic technique

As a Type 4 alloy Wirobond® SG ful ls all criteria of the ISO 22674 and ISO 9693-1 Standards.

The advantages for you:

  • A wide range of dental restorations are covered with only one alloy, e.g. veneered crowns or removable partial dentures
  • Due to the high strength of the alloy you are always on the safe side, even with problematic situations such as long-span bridges
Reliable processing

Wirobond® SG alloy contains silicon which ensures reduction of the oxidation during melting.

The advantages for you:

  • Precise recognition of the casting point both with centrifugal casting machines and vacuum pressure casting machines, e.g. Nautilus® or Fornax®
  • The very good flow behaviour ensures smooth and accurately fitting castings
  • Easy casting and reliable further processing
Reliable porcelain veneering

Wirobond® SG can be veneered with composite or porcelain. All conventional veneering porcelains with corresponding CTE values can be used.

The advantages for you:

  • Wirobond® SG allows normal cooling (depending on the porcelain) and provides effective, economic processing in the laboratory
  • Reliable metal-ceramic bond without additional expensive bonder
  • Minimises the risk of splitting off intraorally at a later date
Optimised for laser-welding technology

Wirobond® SG is ideal for laser-welding due to the optimal, carbon-free composition. Solder and welding joints can be polished very easily and are no longer visible after polishing.

The advantages for you:

  • Reliable, durable and biocompatible joint when soldering and laser-welding

Wirobond® SG has excellent corrosion behaviour.

The advantages for you:

  • No cytotoxic potential, no skin irritations or allergic sensitisation
  • Safety for the dentist and patient
  • Biocertificate available at www.bego.com
Alloy characteristics Standard values
Alloy type (ISO 22674) 4
Density 8.6 g/cm3
Preheating temperature 900–1000 °C
Solidus, liquidus temperature 1385, 1420 °C
Casting temperature approx. 1480 °C
Young’s modulus 200 GPa
Proof strength (Rp0.2) 485 MPa
Ultimate strength (Rm) 630 MPa
Elongation after fracture (A5) 11 %
Vickers hardness (HV10) 305 HV10
Coef cient of thermal expansion (CTE) 25–500 °C, 10-6 K-1 14.3
Composition in % by mass
Co 63.8 · Cr 24.8 · W 5.3 · Mo 5.1 · Si 1.0
Availability Presentation Content REF
Wirobond® SG 1 Pack 1000 g 50128
Wiroweld CoCr laser wire, carbon-free
Ø 0.5 mm 1 Pack 1.5 m – 2 g 50005
Wirobond® soldering rods before firing 1 Pack 4g 52622
Wirobond® soldering rods 1 Pack 4g 52622

We reserve the right to make changes in the design, pack contents and composition. Statements and recommendations on technique are based on our experience and tests and should be regarded as guidelines. Date of issue: March 2017

Contact / Service

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