Sandvik Bioline 316LVM (Bar)
Datasheet updated 2012-08-02 10:33:47 (supersedes all previous editions)
Sandvik Bioline 316LVM is a molybdenum-alloyed vacuum arc-remelted stainless steel for the production of both temporary and permanent implants. The grade is characterized by:
- High strength
- High fatigue strength
- Excellent microcleanliness
- Excellent structural homogeneity
- High surface finish
Standards
- UNS S31673
- DIN X 2 CrNiMo 18 15 3
Product standards
- Bar and wire: ASTM F138
- ISO 5832-1
- BS ISO 5832-1 (replaces BS 7252-1)
Chemical composition (nominal) %
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | N |
|---|---|---|---|---|---|---|---|---|---|
| max | max | max | max | max | |||||
| 0.025 | 0.6 | 1.7 | 0.025 | 0.003 | 17.5 | 14 | 2.8 | 0.10 | 0.10 |
Forms of supply
Round bar
Ground: 10-20 mm (0.394-0.787 in.)
Ground and peeled: 21-100 mm (0.787-3.94 in)
Tolerances
h8 - h11 depending on size and tensile strength
Flat and square bar
Flat and square bar can be delivered in the size range below. Contact us for further data on specific width x thickness combinations.
Width/thickness in straight lengths: 5-100 mm
Other product forms
Sandvik Bioline 316LVM can also be supplied as tube (thick wall or thin wall), wire and profiles (shaped wire).
Mechanical properties
| Product form | Condition | Tensile strength | Proof strength | Elongation | Hardness, Brinell | ||
|---|---|---|---|---|---|---|---|
| Rm | Rp0,2 | A,% | |||||
| MPa | ksi | MPa | ksi | ||||
| min | min | min | min | typical | typical | ||
| Bar, Wire | Annealed | 490 | 71 | 190 | 28 | 45 | 160 |
| Bar, Wire | Medium tensile | 900 | 131 | 700 | 101 | 15 | 285 |
| Bar, Wire | High tensile | 1100 | 160 | 800 | 116 | 12 | 300 |
| Bar, Wire | Extra high tensile | 1400 | 203 | ||||
| Tube, thick wall | Bright annealed | 515-690 | 75-100 | 220 | 32 | min 45 | 155-210 |
| Tube, thick wall | Cold finished | 860-1100 | 125-160 | 690 | 100 | min 12 | 260-330 |
| Profile | Cold rolled | 860-1100 | 125-160 | 690 | 100 | 12 | 260-330 |
| Tube , thin wall Tube, thin wall |
Annealed Cold worked |
490-690 860-1100 |
71-100 125-160 |
190 690 |
28 100 |
40 12 |
|
Note that extra high tensile strength can be achieved for diameter ≤ 5 mm
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 316LVM has 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 316LVM is capable of passing the Monypenny Strauss intergranular corrosion test, in accordance with ISO / ASTM requirements.
Machining
| Hardness | Cutting speed range | Feed range | |||
|---|---|---|---|---|---|
| SFM | m/min | IPR | mm/rev | ||
| Turning | 160-300 | 900-145 | 275-45 | 0.002-0.024 | 0.05-0.6 |
| Milling | 160-300 | 870-165 | 265-50 | 0.002-0.016 | 0.05-0.4 |
| Drilling | 160-300 | 115-195 | 35-60 | 0.002-0.012 | 0.05-0.3 |
Applications
Sandvik Bioline 316LVM is used by customers for implant applications; hip stems, femoral heads, spinal systems, acetabular cups, intramedullary nails, bone screws, knee joints, and pins, bone and nail plates, internal fixation devices, dental implants, staples.
This grade is also used for cardiovascular applications: guide wires, cardiac stents and for surgical instruments and tools; blood lancets, stylets, trocars.
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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