NPM-Bonding Alloys / CoCr based

Starbond CoS

CoCrWMo bonding alloy for conventional, high-fusing (low expansion) ceramics. Free of nickel, lead, beryllium and cadmium. Type 5 pursuant to DIN EN ISO 22674.
  • High degree of purity
  • Biocompatible and extremly corrosion resistant

Advantages for Dental Technicians:

  • Wide range of indications
  • System-free working due to very good alloy properties
  • Pleasant polishing properties and easy finishing due to low hardness of 280 HV10
  • A CTE of 14.0 enables flexibility in ceramic selection and safe veneering
  • No cooling phase required, depending on the ceramics
  • Excellent metal-ceramic bonding, even without bonder
  • An oxidation firing can be omitted
  • Optimal conditions for laser welding
  • Application flexibility and easy melting, no sparking


Co 59%
Cr 25%
W 9.5%
Mo 3.5%
Si 1%
C,Fe,Mn,N <1%

Technical properties:

Proof stress (Rp 0.2) 650MPa
Ultimate tensile strength 910MPa
Elongation 8%
Elastic modulus 200GPa
Vickers hardness 280 HV 10
Density 8.8g/cm³
Melting range 1305 - 1400°C
Preheating temperature 850 - 950°C
Casting temperature 1500 - 1550°C
CTE (20-600°C) 14.0 x 10⁻⁶K⁻¹
Laser weldable Yes
Type (DIN EN ISO 22674) 5

Trade unit:

1000g Ref. 133000
250g Ref. 133250