Chrome cobalt

CHROME COBALT / COBALT-BASED ALLOYS

DesignationNames
Brands
Stock
Co-Cr-Mo (forge)
Data sheet
CCM®
Co-Cr-Mo (fonderie)
Co-Ni-Cr-Mo MP35N®
Cr-Ni-W-Co
L605
2.4964

Please contact us for all other grades.

STANDARDS RELATING TO COBALT CHROME

Co-Cr-Mo ( forging ) : ASTM F 1537 / ISO 5832.12 / ISO 22674
Co-Cr-Mo ( casting ) : ASTM F 75 / ISO 5832.4
Co-Ni-Cr-Mo – MP35N : ASTM F562 / ISO 5832-6
Cr-Ni-W-Co – L605 : ASTM F 90 / ISO 5832-5

We have a range of cobalt chrome and cobalt-based alloys for medical, dental, aeronautical and industrial applications

CoCr is a cobalt-based alloy, with a higher density than stainless steels. It is resistant to corrosion, wear and heat. It combines good mechanical properties with excellent tribology. Its low carbon content and a uniform distribution of carbides in its microstructure give him good polishing properties.

This alloy is used in the medical sector for manufacturing orthopaedic knee, hip and spine prostheses. CoCr provides greater rigidity than that of titanium of stainless steel.

This grade is also used in the dental sector for making prostheses (bridges, etc.).

For these applications we offer cobalt chrome in different forms:

  • Either as small diameter bars,
  • Or as discs of varying thickness for CAD/CAM applications

The discs we offer are made from forged bars. The uniform microstructure and fine grain size are advantageous when manufacturing dental prostheses.

The grade we offer is cobalt chrome molybdenum (CoCrMo). It is free from nickel and beryllium; its fine structure, produced by powder metallurgy, prevents deformation of parts after machining. An additional advantage of molybdenum for the manufacture of dental prostheses is the alloy’s high-temperature stability, which facilitates bonding to ceramics.

Reference standards:

For the medical sector, two standards apply:

  • ASTM F1537 /ISO 5832-12 /ISO 22674 for forged products
  • ASTM F75 / ISO 5832-4 for cast products

Mechanical properties:

Density: typical value: 8.3 g/ cm3
Hardness: typical value: 36-40 HRC
Modulus of elasticity: > 150000 MPa
Yield strength in tensile tests Rp 0.2: > 517 MPa
Elongation at break A%: > 20%
Coefficient of thermal expansion (CTE):
typical value from 20° to 500°C: 14.1 x 10-6 K-1
typical value from 20° to 600°C: 14.5 x 10-6 K-1