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CoCr28Mo is a nonmagnetic Co, Cr and Mo content for implant. Good corrosion resistance and good fatigue and wear resistance. Compared to standard qualities, the percentage of Nickel is less than 0.1% to ensure better biocompatibility. This alloy is especially applicable for medical implants (endoprothesis and osteosynthesis), wherever high mechanical stress is expected. It is widely used in micromechanics, where hardness, toughness, ductility and corrosion resistance are required.
This alloy of Cobalt-Chromium-Molybdenum for implants is the MicroMelt Biodur Carpenter CCM alloy (Cobalt CCM ASTM F1537). It meets the strictest requirements regarding biocompatibility and corrosion resistance. It is produced by powder metallurgy resulting in an exceptionally fine microstructure. But is also tough, ductile, hard, as well as fatigue and wear resistant. Its high cobalt content may impair its machinability and its cold deformability is difficult. It is non-magnetic.
Cobalt CCM ASTM F1537 is especially applicable for medical implants (endoprothesis and osteosynthesis) wherever high mechanical stress is expected. It is also widely used in the watch making industry as well as other industries where hardness, toughness, ductility and corrosion resistance are required.
The chemical composition of CoCr28Mo alloy is outlined in the following table.
| Chemical Composition Limits | |||||||||
| Weight % | C | Si | Mn | Cr | Mo | Ni | Fe | N | Co |
| CoCr28Mo | 0.14 max | 1 max | 1 max | 26.00-30.00 | 5.00-7.00 | 1 max | 0.75 max | 0.25 max | Bal |
| ASTM F1537 | 0.14 max | 1 max | 1 max | 26.00-30.00 | 5.00-7.00 | 1 max | 0.75 max | 0.25 max | Bal |
| Grade | UNS | DIN | EN | AMS | ASTM | JIS | |
| Alloy 1 |
UNS R31537 |
CoCr28Mo
|
ASTM F1537 | - | |||
The mechanical properties of CoCr28Mo alloy are displayed in the following table.
| Grade | UTS (Mpa) | Yield Strength (Mpa) | Elongation 4D (%) | Hardnesss |
| ISO 5832-12 | 1192 min | 827 min | 12 | 40 HRC |
Medical implants
Endoprosthesis devices
Osteoprosthesis devices
Watch making
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