Datasheet updated

2024-03-14 15:21
(supersedes all previous editions)

Alleima® F562 is a non-magnetic nickel-cobalt base alloy that has a unique combination of properties: ultra high strength, toughness, ductility and excellent corrosion resistance. Alleima® F562LTi is the low titanium version of Alleima® F562.

The alloy is cold worked to obtain strength level of 1790-2205 MPa (260 to 320 ksi). It can also be aged in the work hardened condition to achieve higher strengths. A leading material for permanent implants, Alleima® F562 is vacuum melted in multiple steps for extreme cleanliness.

Alleima® F562 is resistant to corrosion in hydrogen sulfide, salt water and other chloride solutions as well as mineral acids (nitric, hydrochloric, sulfuric).

In addition, it has exceptional resistance to crevice and stress corrosion cracking having been operationally proven in sea water and hostile environments.

For medical use, Alleima® F562 is delivered with the highest surface finish (Medical class) in order to maximize the fatigue strength, which is critical in implant devices such as lead wires for pacemakers and heart valve supports.


  • ASTM: F562-02
  • ISO: 5832/6

Product standards

AMS 2269


Alleima®F562 is used for applications such as stents, pacemaker leads and ICD leads.

Chemical composition (nominal) %

Ni Co Cr Mo
35 35 20 10

Forms of supply

Alleima® F562 can be supplied in round wire form in the following size ranges:

  • 0.018 to 1.422 mm (0.0007 to 0.056 in.)

Mechanical properties

Typical mechanical properties at 20°C/68°F

Condition Tensile strength, Rm Proof strength, Rp0.2 Elongation A Hardness
MPa ksi MPa ksi %
min min min min in 4D typical
Annealed 896 130 379 55 65 90 HRB
Cold worked 1379 200 1310 190 2 43 HRC
Aged 593°C - 4 hours 2034 295 1965 285 2 51 HRC

Physical properties

Typical data

Density ( 20°C) 8.4 g/cm3 0.30 lb/in3
Modulus of elasticity, (20°C)
cold worked and aged
232 103 MPa
234 103 MPa
33.8 X 103 ksi
34.0 X 103 ksi
Shear modulus, (20°C)
cold worked and aged
83.8 103 MPa
80.9 103 MPa
12.09 X 103 ksi
11.74 X 103 ksi
Thermal conductivity (20°C) 11.2 W /(m °C) 78 Btu/(ft h°F)
Electrical resistivity* 1033 µΩ mm 40.67 µΩ in.
Thermal expansion, x10-6 (-100-121°C) 11.2 per °C 6.2 per °F

*Note: electrical resistivity is lower for cold worked material

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Alleima materials.