Sandvik Bioline F562 / Sandvik Bioline F562LTi (Wire)
Datasheet updated 2013-02-18 14:23:37 (supersedes all previous editions)
Sandvik Bioline 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 Bioline F562LTi is the low titanium version of Sandvik Bioline 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, Sandvik Bioline F562 is vacuum melted in multiple steps for extreme cleanliness.
Sandvik Bioline 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, Sandvik delivers F562 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.
Standards
- ASTM F562-02
- ISO 5832/6
Product standards
AMS 2269
Chemical composition (nominal) %
| Ni | Co | Cr | Mo |
|---|---|---|---|
| 35 | 35 | 20 | 10 |
Forms of supply
Sandvik Bioline F562 can be supplied in round or rectangular wire form in the following size ranges:
- Round wire: 0.018 to 1.422 mm (0.0007 to 0.056 in.)
- Flat wire: 0.0191 mm (0.00075 in.) minimum thickness ; 10:1 maximum aspect ratio ; 3.0 mm (0.118 in.) maximum width.
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
| Property | ||
|---|---|---|
| Density ( 20°C) | 8.4 g/cm3 | 0.30 lb/in3 |
| Modulus of elasticity, (20°C) | ||
|
annealed
cold worked and aged |
232 103 MPa 234 103 MPa |
33.8 X 103 ksi 34.0 X 103 ksi |
| Shear modulus, (20°C) | ||
|
annealed
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 µohm mm | 40.67 µohm in. |
| Thermal expansion, x10-6 (-100-121°C) | 11.2 per °C | 6.2 per °F |
*Note: electrical resistivity lower for cold worked material
Applications
Sandvik Bioline F562 are used by customers for applications such as stents, pacemaker leads and ICD leads.
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 Sandvik materials.
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