Cobalt alloys
M64BC
Spécifications
EU
CoCr28Mo
USA
UNS: R31537
ASTM grade
Alloy 1
ASTM std
F1537
Composition
C
< 0.14
Ni
< 1.00
Cr
28
Mo
6
Co
Base
Applications
• Production of permanent surgical implants and any parts implanted in the human body.
Characteristics
• M64BC is a cobalt alloy with a high chromium and molybdenum content.
• Its high corrosion resistance makes it particularly suitable for the production of implants in contact with living tissue.
• Its composition has been optimised to enable it to be closed-die forged.
• The high level of mechanical strength that can be attained during this operation results in a steel with excellent fatigue properties while maintaining good toughness. It is therefore possible to produce very thin parts with a high level of safety.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
|---|---|---|---|
| H | 1160 | 650 | 35 |
| TM | > 1175 | > 850 | > 14 |
Key to heat treatment symbols
| Solution treated | H | Annealed | R |
|---|---|---|---|
| Thermo-mechanical treatment | TM | Quenched and tempered | T+RV |
| Sub-zero treatment | F | Solution treated and aged | H+V |