Which Cobalt Alloys Are Good Choices For Medical Implants?
Aug 25, 2025
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Lork Group gives you the best material choice for cobalt alloy medical implants!
Cobalt alloys are undoubtedly the "main force" in the field of medical implants, especially in orthopaedics. For example, cast cobalt-chromium-molybdenum (ASTM F75) alloy is suitable for joint prostheses with complex shapes; forged cobalt-chromium-molybdenum (ASTM F1537) alloy has better performance and is used for high-requirement structural components; cobalt-nickel-chromium-molybdenum (ASTM F562/MP35N) is the "king of strength" and is used in the most demanding load-bearing scenarios; and L605 alloy is a classic choice for cardiovascular interventional procedures.
We recommend four of our best-selling cobalt alloys for medical implants. We also offer a wide range of cobalt alloys suitable for aerospace, oil & gas, chemical, and other industries.
Lork Group: Four major medical alloys
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The cobalt content is generally between 59% - 65%.
Numerical designations:
W. Nr 2.4979 – UNS R31537
Standards:
ISO 5832-12 (Alloy 1) – ASTM F 1537 (Alloy 1) –
ASTM F799 (chemistry only) CoCr28Mo6.
.
The cobalt content is generally between 29% - 37%.
Numerical designations:
W.Nr 2.4782 – UNS R330035
Standards:
ISO 5832-6 – ASTM F 562
AMS 5758- AMS 5845 – AMS 5844
CoNi35Cr20Mo10
The cobalt content is generally between 45% - 55%.
Numerical designations:
W. Nr 2.4964 – UNS R30605
Standards:
ISO 5832-5 – ASTM F 90
AMS 5537- AMS 5759
The cobalt content is generally between 39% - 41%.
Numerical designations:
W. Nr 2.4711 – UNS R30003 – UNS R30008
Standards:
ISO 5832-7 – ASTM F 1058
AMS 5876 – AMS 5833
A Comprehensive Understanding of Cobalt Materials
The History of Cobalt and Current Perceptions
To date, global epidemiological studies have shown that patients implanted with cobalt-containing implants are not at any risk of cancer, including site-specific cancers.
Relevant publications also point out that cobalt-containing alloys are the product of decades of clinical experience and engineering design, culminating in widespread use and demonstrated safety.
Summary
Finally, Lork Group conducts a comprehensive review of the benefit-risk profile and an assessment of alternative materials. We rigorously select raw materials for cobalt alloys used in medical devices to ensure they meet final inspection requirements and are suitable for a variety of medical scenarios. We also participate in experimental research, developing materials that address practical medical issues based on medical theories such as biocompatibility, pathology, and epidemiology. We aim to supply key components for medical surgeries and devices, providing patients with safe and often life-changing options.
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If you want to know more about the spot specifications of products or need customised products, get a quick quote, etc., please contact us!
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Erqi District, Zhengzhou City, Henan Province, China
Phone Number
(86)-19937075488
susan@lorkgroup.com
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