Ti-6Al-7Nb
UNS R56700
Description
Ti-6Al-7Nb is an alpha-beta titanium alloy with excellent biocompatibility and high strength, which is developed for use in the medical implants applications. The alloy, first synthesized in 1977 containing 6% aluminum and 7% niobium, is one of the titanium alloys that built of hexagonal α phase (stabilised with aluminum) and regular body-centred phase β (stabilised with niobium). Its properties are similar to Ti-6Al-4V but provides better biocompatibility by replaced vanadium with niobium as the beta stabilizing agent. In addition, it has higher corrosion resistance in relation to Ti-6Al-4V alloys. Ti-6Al7Nb is therefore an ideal titanium alloy for medical, dental and surgical applications.
Chemical Component
| Ti | Fe | O | C | N | H | Al | Nb | Ta |
|---|---|---|---|---|---|---|---|---|
| Balance | 0.25% max | 0.20% max | 0.08% max | 0.05% max | 0.009% max | 5.5-6.5% | 6.5-7.5% | 0.5% max |
Basic Information
| Items | Ti-6Al-7Nb |
|---|---|
| Catalog | ACAM-Ti-A016 |
| Density | 4.52 g/cm3 |
| Specific Heat | 540-560 J/kg·K |
| Beta Transus Temperature | 1015 ± 4°C |
| Melting Range | 1800-1860 K |
Material Forms
Alfa Chemistry offers Ti-6Al-7Nb in a variety of forms, including Bar, Rod, Wire, Rings and Forgings.
Mechanical Properties
| Properties | Conditions | Ultimate Tensile Strength | >0.2% Yield Strength | Elongation | Reduction of Area |
|---|---|---|---|---|---|
| Minimum tensile properties | Bar | 130.5 ksi (900 Mpa) | 116 ksi (800Mpa) | 10% | 25% |
| Typical tensile properties | 0.25-0.75" Diameter bar | 148 ksi (1021Mpa) | 132 ksi (910Mpa) | 15% | - |
Additional Properties
Biocompatibility: Ti-6Al-7Nb has a high biocompatibility. The oxides from Ti-6Al-7Nb is saturated in the body and are not transported in vivo or are a bioburden. The alloy will not create adverse tissue tolerance reactions and creates fewer giant cell nuclei. Ti-6Al-7Nb also shows a high compatibility to ingrowth to the human body
Specifications
- ASTM 1295 - Bar, Rod and Wire (Annealed)
- ISO 5832-11 Bar (Annealed)
Applications
Ti-6Al-7Nb is mainly used in the medical and surgical device, and the typical applications include:
- Implant devices replacing such as: failed hard tissue, artificial hip joints, artificial knee joints, bone plates, screws for fracture fixation, cardiac valve prostheses, pacemakers, and artificial hearts.
- Dental application
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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