Alleima® 316LVM is a vacuum remelted, molybdenum alloyed, austenitic stainless steel.
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
Chemical composition (nominal)
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | N |
|---|---|---|---|---|---|---|---|---|---|
| ≤0.025 | 0.6 | 1.7 | ≤0.025 | ≤0.003 | 17.5 | 14 | 2.8 | ≤0.10 | ≤0.10 |
Applications
Alleima® 316LVM is used 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.
Corrosion resistance
Alleima® 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
Alleima® 316LVM is capable of passing the Moneypenny Strauss intergranular corrosion test, in accordance with ISO / ASTM requirements.
Forms of supply
Alleima® 316LVM is supplied as both billet and hot-rolled round bar.
Other product forms
Alleima® 316LVM can also be supplied as tube (thick wall or thin wall) and wire.
Mechanical properties
| Product form | Condition | Tensile strength | Proof strength | Elongation, A | Hardness, Brinell | ||
|---|---|---|---|---|---|---|---|
| Rm | Rp0.2 | ||||||
| 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 |
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 |
Disclaimer: Alleima 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.