Sandvik Bioline High-N (Bar)
Datasheet updated 2012-08-02 10:35:17 (supersedes all previous editions)
Sandvik Bioline High-N is a molybdenum and nitrogen alloyed austenitic stainless steel characterized by:
- A proof strength up to twice that of Sandvik Bioline 316LVM in annealed condition
- Higher corrosion resistance than Sandvik Bioline 316LVM
- High microcleanliness
- High surface finish
- Good forgeability
Sandvik Bioline High-N is used by customers for orthopedic implants and fracture fixation devices.
Standards
- UNS S31675
- BS 7252-9
Product standard
- ASTM F1586
- ISO 5832-9
- BS ISO 5832-9 (replaces BS 7252-9)
Chemical composition (nominal) %
| C max |
Si max |
Mn | P max |
S max |
Cr | Ni | Mo | Cu max |
N | Nb |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.06 | 0.60 | 4.0 | 0.025 | 0.003 | 20.5 | 9.5 | 2.4 | 0.20 | 0.4 | 0.3 |
Forms of supply
Round bar
- Annealed, medium tensile, high tensile
- Diameter 5 - 20 mm: ground
- Diameter 21 - 100 mm: ground and peeled
Tolerances
h9: diameter 5 - 20 mm
h11: diameter 21-65 mm
Flat and square bar
- 5 - 100 mm wide/thick in straight lengths
- Annealed / medium tensile depending on grade and size
- Further data on specific width x thickness combinations shall is available on request
Other product forms
Sandvik Bioline High-N can also be supplied as tube and wire.
Mechanical properties
| Product | Condition | Tensile strength | Proof strength | Elongation A, | ||
|---|---|---|---|---|---|---|
| Rm | Rp0,2 | % | ||||
| MPa | ksi | MPa | ksi | |||
| min | min | min | min | typical | ||
| Wire | 1500 max | 217 max | ||||
| Bar | Annealed | 740 | 107 | 430 | 62 | 35 |
| Bar | Medium | 1000 | 145 | 700 | 102 | 20 |
| Bar | Hard | 1100 | 160 | 1000 | 145 | 10 |
| Tube, thick wall | Bright annealed | 740 | 107 | 430 | 62 | min 35 |
| Tube, thick wall | Cold finished | 1200 | 174 | 1100 | 160 | min 10 |
Specific tensile requirements available on request
Physical properties
| Property | ||
|---|---|---|
| Density ( 20 °C) | 8.0 g/cm3 | 0.29 lb/in3 |
| Modulus of elasticity, x103 (20°C) | 200 MPa | 29.0ksi |
| Specific heat capacity (20°C) | 485 J/(kg °C) | 0.11Btu/(lb°F) |
| Thermal conductivity (20°C) | 14W /(m°C) | 8 Btu/(ft h °F) |
| Thermal expansion, x10-6 (30-100°C) | 16.5 per °C | 9.5 per °F |
Corrosion resistance
Sandvik Bioline High-N has a very good resistance in physiological environments to:
- General and intergranular corrosion due to high purity and low ferrite content
- Pitting and crevice corrosion due to the high molybdenum content
Sandvik Bioline High-N is capable of passing the Monypenny Strauss corrosion test in accordance with ISO / ASTM requirements.
Machining
| Hardness | Cutting speed range | Feed range | |||
|---|---|---|---|---|---|
| SFM | m/min | IPR | mm/rev | ||
| Turning | 250-400 | 885-145 | 270-45 | 0.002-0.024 | 0.05-0.6 |
| Milling | 250-400 | 855-245 | 260-75 | 0.002-0.016 | 0.05-0.4 |
| Drilling | 250-400 | 115-195 | 35-60 | 0.002-0.012 | 0.05-0.3 |
Disclaimer: Sandvik is not providing any products or services that are intended or may be construed to be recommending or otherwise advising on, in any manner, the design, suitability, appropriateness or effectiveness, from a medical/biological/safety perspective, of any medical material, instrument and/or medical device.
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