Ti-6Al-7Nb (ATI 6-7, UNS R56700) is an alpha-beta titanium alloy developed for medical and surgical implants, with properties close to Ti-6Al-4V but substituting niobium for vanadium. Specified to ASTM F1295 and ISO 5832-11, it has been in clinical use since 1986 and is widely used for orthopaedic implants: total hip-replacement stems, fracture-fixation plates, intramedullary rods and nails, spinal devices, screws and wires. Its elastic modulus is about 105 GPa in the solution-annealed condition.
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What is Ti-6Al-7Nb (ATI 6-7) Round Bar?
Ti-6Al-7Nb (ATI 6-7) is an alpha-beta titanium alloy for surgical implants (UNS R56700). Aurico Alloys LLP supplies it as round bar from Mumbai, India, cut to size and certified to EN 10204 3.1. Material is supplied for medical and engineering use against the applicable ASTM F1295 / ISO 5832-11 requirements.
Size Range & Supply
| Grade / Designation | Ti-6Al-7Nb (ATI 6-7) |
|---|---|
| UNS Number | R56700 |
| Product Form | Round Bars |
| Size Range | Made to order; quoted against the mill programme in force at the time of enquiry. |
| Condition / Finish | Annealed; pickled or ground to requirement. |
| Certification | EN 10204 3.1 mill test certificate. |
| Packaging | Wooden cases or as required for export. |
The applicable specification for this form is shown in the Equivalent Grades & Standards table below.
Equivalent Grades & Designations
| Property | Value |
|---|---|
| UNS number | R56700 |
| Density | 4.52 g/cm3 |
| Melting range | 1538-1649 °C |
| Beta transus | 1850 °F (± 27 °F) |
| Modulus of elasticity (solution annealed) | 105 GPa |
| Rod and bar specification | ASTM F1295 / ISO 5832-11 |
Identifiers and physical constants for Titanium Ti-6Al-7Nb. A dash means no such designation is published for this grade.
Chemical Composition of Ti-6Al-7Nb (ATI 6-7) Round Bar
| Element | Min (%) | Max (%) |
|---|---|---|
| Aluminium (Al) | 5.5 | 6.5 |
| Niobium (Nb) | 6.5 | 7.5 |
| Tantalum (Ta) | — | 0.50 |
| Iron (Fe) | — | 0.25 |
| Oxygen (O) | — | 0.20 |
| Carbon (C) | — | 0.08 |
| Nitrogen (N) | — | 0.05 |
| Hydrogen (H) | — | 0.009 (sampled from the semi-finished mill product) |
| Titanium (Ti) | — | Balance |
Composition limits for Titanium Ti-6Al-7Nb. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical Properties of Ti-6Al-7Nb (ATI 6-7) Round Bar
| Property (ASTM F1295, annealed) | Requirement |
|---|---|
| Tensile strength (min) | 900 MPa (130.5 ksi) |
| 0.2% yield strength (min) | 800 MPa (116 ksi) |
| Elongation (min) | 10% |
| Reduction of area (min) | 25% |
Specification minimum values to ASTM F1295 for annealed bar up to 100 mm; the mill test certificate supplied with your order states the actual values.
Applications & Uses of Ti-6Al-7Nb (ATI 6-7)
| Industry / Application | Use |
|---|---|
| Total hip replacement | Femoral stems and modular hip components. |
| Trauma & fracture fixation | Bone plates, intramedullary rods, nails and screws. |
| Spinal devices | Rods, screws and connectors. |
Frequently Asked Questions
Global Export
We ship Ti-6Al-7Nb (ATI 6-7) Round Bar worldwide from Mumbai. See every destination on our export markets page.
Supply Across India
We deliver across India from our Mumbai stockyard. See every city on our supply locations page.