6AL-4V ELI (Grade 23)
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6Al-4V ELI is one of the most widely used Titanium alloys in the medical industry. It is certified to ASTM F136, and commonly referred to as implant grade 6-4 Titanium. It's properties of biocompatibility, corrosion resistance, high strength, and toughness make it especially suitable for implants and other medical devices.

The main difference between Ti-6Al-4V ELI (Grade 23) and Ti-6Al-4V (Grade 5) is that in ELI (Extra Low Interstitials) the maximum oxygen content is lowered to 0.13%. This gives the material an improved fracture toughness.

Among it's uses in the medical industry are:

  • Orthopedic implants
  • Bone and Joint Replacement
  • Dental root implants
  • Surgical Clips
  • Cryogenic Vessels

6AL-4V ELI is also referred to as:

  • Grade 23 Titanium
  • ASTM F136

 

Chemical

Chemical Range for 6AL-4V ELI
Element Minimum Maximum
Carbon -- 0.08
Nitrogen  -- 0.05
Hydrogen -- 0.012
Iron -- 0.25
Oxygen -- 0.13
Aluminum 5.5 6.5
Vanadium 3.5 4.5
Titanium -- Balance

Mechanical

Typical Mechanical Properties for 6AL-4V ELI
Form Tensile Strength, min Yield Strength, min Elongation in 4D, min
Strip, Sheet and Plate-ASTM B265 120 ksi 110 ksi 10%
Bar and Rod-ASTM B348 120 ksi 110 ksi <1.0" 7.5%, ≥1.0" 6.0%

Physical

Typical Physical Data for 6AL-4V ELI
Density 0.160 lb / cu. in.
Electrical Resistivity 1.71 µohms-m
Thermal Conductivity 6.6-6.8 W/mK
Modulus of Elasticity  16.5 psi x 10(6)

Specs

Specifications
ASTM B265-Gr23 (Sheet-Industrial)
ASTM B348-Gr23 (Bar-Industrial)
ASTM F136 (Medical)
AMS 4907 (Aerospace Sheet)
AMS 4930 (Aerospace Bar)
AMS-T 9046A AB-2 (Aerospace Sheet)
AMS-T 9047A AB-2 (Aerospace Bar)
MIL-T 9047J AB-2 (Aerospace Sheet)
MIL-T 9047G AB-2 (Aerospace Bar)
UNS R56401