instrument and implant grade metal alloys

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Titanium Alloy Grade 23 6Al-4V ELI (3.7165) Medical Alloy

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.


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)
A4d (%- min)
ASTM / ISO 900 795 10 36


EN TiAl6V4
ISO 5832-2
UNS R56401


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.

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NOTE: Weights calculated are theoretical. Manufacturing tolerances should be allowed for and results adjusted accordingly.