Titanium 6Al-4V ELI
Grade 23
Material Data Sheet
Titanium 6Al-4V ELI (Grade 23) is very similar to Titanium 6Al-4V (Grade 5), except that the 6Al-4V ELI grade contains reduced levels of oxygen, nitrogen, carbon, and iron. ELI is short for “Extra Low Interstitials” and these lower interstitials provide improved ductility and better fracture toughness, along with a minor reduction in strength. Most importantly, the alloy exhibits improved high-cycle fatigue strength (no cracking). These benefits make Titanium 6AL-4V ELI the ultimate medical and dental Titanium grade. It can be used in biomedical applications such as medical implants and dental archwires due to its biocompatibility, good fatigue strength, and low modulus.
| Element | Content(%) |
|---|---|
| Titanium, Ti | 88.09 – 91 |
| Aluminum, Al | 5.5 – 6.5 |
| Vanadium, V | 3.5 – 4.5 |
| Iron, Fe | ≤ 0.25 |
| Carbon, C | ≤ 0.080 |
| Nitrogen, N | ≤ 0.030 |
| Hydrogen, H | ≤ 0.0125 |
| Properties | Metric | Imperial |
|---|---|---|
| Density | 4.43 g/cm3 | 0.160 lb/in3 |
| Melting point | 1604 – 1660°C | 2919 – 3020°F |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 860 MPa | 125000 psi |
| Yield strength | 790 MPa | 115000 psi |
| Poisson’s ratio | 0.342 | 0.342 |
| Elastic modulus | 113.8 GPa | 16510 ksi |
| Shear modulus | 44.0 GPa | 6380 ksi |
| Elongation at break | 15% | 15% |
| Hardness, Brinell | 326 | 326 |
| Hardness, Knoop | 354 | 354 |
| Hardness, Rockwell C | 35 | 35 |
| Hardness, Vickers | 341 | 341 |
- Orthopedic pins and screws
- Orthopedic cables
- Ligature clips
- Surgical staples
- Springs
- Orthodontic appliances
- In joint replacements
- Cryogenic vessels
- Bone fixation devices
- AMS 4907
- AMS 4931
- ASTM F136
- ASTM F467 (TI-5)
- ASTM F468 (5)
- ASTM F468 (S)
- MIL F-83142
- MIL T-9046
- MIL T-9047
- SPS M618
- AMS 4930
- AMS 4956
Key Words: 6-4eli, 6al-vELI, Titanium 6-4 ELI, Ti 6-4 ELI, Titanium 6Al-4V ELI, ti 6aL-4v, ELI GRADE 23, ASTM Grade 23 titanium; UNS R56401 (ELI); Ti6Al4V ELI, biomaterials, biomedical implants, biocompatibility
Titanium 6Al-4V alloy is an alpha+beta alloy, containing 6% aluminum and 4% vanadium. It is designed for a good balance of characteristics, including strength, ductility, fracture toughness, high-temperature service, creep resistance, weldability, workability and thermal processing (higher strength is easily obtained through treatment).
Titanium 6Al-4V is, therefore, used for many airframe and engine parts and is commonly referred to as the “workhorse” of Titanium alloys, accounting for as much as 50% of the world’s total Titanium usage. There are a great many applications for Titanium 6Al-4V in aircraft, where high reliability is required. General structural materials such as bolts and seat rails are made from Ti 6Al-4V. In engines, the alloy is used for fan blades and cases in the intake section where temperatures are relatively low.
Its usability lies in its many benefits. Ti 6Al-4V may be heat-treated to increase its strength. It can be used in welded construction at service temperatures of up to 600° F. Titanium 6Al-4V alloy offers its high strength at a lightweight, useful affordability, and high corrosion resistance. This makes it an ideal choice for use across may platforms including aerospace, medical, marine and chemical processing industries.
Key Words: Titanium 6-4, Ti 6-4, Titanium 6Al-4V, ti 6aL-4v, GRADE 5,UNS R56400; ASTM Grade 5 titanium; UNS R56401 (ELI); Ti6Al4V, biomaterials, biomedical implants, biocompatibility
