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Titanium 6Al-4V ELI (extra-low interstitials), also known as Grade 23, is the implant approved version for the more regular Titanium Grade 5 alloy. The reduced interstitial elements oxygen and iron improve ductility and fracture toughness with some reduction in strength.
6Al-4V ELI Titanium alloy is a VAR melted and remelted alloy and as such has good biocompatibility as well as good corrosion resistance in seawater and marine environments.
The good biocompatibility of 6Al-4V ELI comes from the fact that it will spontaneously passivise in the presence of Oxygen, forming a very thin layer of titanium dioxide. Further enhancement of its biocompatibiliy and corrosion resistance is acheived by anodic oxidation producing thicker protective layers.
Applications
Orthapaedic screws, pins and cables
Surgical staples
Ligature clips
Orthodontic instruments
Typical Chemical Composition
| C | Al | V | Y | Fe | O | N | H | Ti | |
| Min | 5.50 | 3.50 | |||||||
| Max | 0.08 | 6.50 | 4.50 | 0.005 | 0.25 | 0.13 | 0.05 | 0.012 | Balance |
Typical Mechanical Properties
| Spec | Tensile (Rm) MPA (min) |
Yield (R0.2%) MPA (min) |
Elongation A4d (%- min) |
Hardness HRC |
| ASTM / ISO | 900 | 795 | 10 | 36 |
Specifications
3.7165
EN TiAl6V4
ISO 5832-2
AFNOR T6V
ASTM B348
ASTM F136
UNS R56401
Availability
Titanium Alloy 6Al-4V ELI (3.7165) is readily available in precision ground bar and wire starting from 0.2mm diameter up to 100mm.
Disclaimer : Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.
