Exera® 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. Sandvik F562LTi is the low titanium version of Exera® 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, Exera® F562 is vacuum melted in multiple steps for extreme cleanliness.
Exera® 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, Exera® 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.
Exera® F562 is used for applications such as stents, pacemaker leads and ICD leads.
Chemical composition (nominal) %
Forms of supply
Exera® 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.)
Typical mechanical properties at 20°C/68°F
|Condition||Tensile strength, Rm||Proof strength, Rp0.2||Elongation A||Hardness|
|Cold worked||1379||200||1310||190||2||43 HRC|
|Aged 593°C - 4 hours||2034||295||1965||285||2||51 HRC|
|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