Cobalt Chrome MP1

Direct Metal Laser Sintering Material

Parts built from CobaltChrome MP1 conform to the chemical composition UNS R31538 of high carbon CoCrMo alloy. They are nickel-free (< 0.1 % nickel content) and are characterized by a fine, uniform crystal grain structure. As built CobaltChrome MP1 meets the chemical and mechanical specifications of ISO 5832-4 and ASTM F75 for cast CoCrMo implant alloys, as well as the specifications of ISO 5832-12 and ASTM F1537 for wrought CoCrMo implants alloys except remaining elongation. The remaining elongation can be increased to fulfil even these standards by high temperature stress relieving or hot isostatic pressing (HIP).


Parts made from EOS CobaltChrome MP1 can be machined, spark-eroded, welded, micro shotpeened, polished and coated if required. They are suitable for biomedical applications (note: subject to fulfillment of statutory validation requirements where appropriate), and for parts requiring high mechanical properties in elevated temperatures (500 – 1000° C) and with good corrosion resistance.

Cobalt Chrome MP1
Property ASTM Metric Units
(As built)
Metric Units
(Stress Relieved)
Ultimate Tensile Strength E466 1350 MPA 1100 MPA
0.2% Yield Strength E466 1060 MPA 600 MPA
Elongation E466 11% Min 20%
Fatigue life E466 Approx. 560 MPA Approx. 560 MPA
Modulus of Elasticity E466 200 GPA 200GPA
Hardness, Rockwell B E466 35-45 35-45

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