Titanium Alloy 6Al-7Nb (UNS R56760 / ISO 5832-11) – Medical Implant Alloy Ti-6Al-7Nb is a vacuum-arc-melted and remelted alpha-beta titanium alloy specifically formulated for medical implant applications. Niobium replaces vanadium as the primary beta-stabilizing element, providing comparable mechanical strength to Ti-6Al-4V ELI with enhanced biocompatibility and corrosion resistance. This alloy is widely used for spinal devices, joint replacements, fracture fixation plates, and surgical screws .
1. Product Specifications & Physical DataZYTC Alloy supplies Ti-6Al-7Nb in precision forms for medical implant manufacturing requiring verified biocompatibility and mechanical properties. Available Forms: Precision ground bar (1.5mm – 50mm diameter), wire, sheet, and custom configurations . Specifications: ASTM F1295, ISO 5832-11, EN TiAl6Nb7, UNS R56760, Werkstoff Nr. 9.9367 .
| Chemical Composition (Weight %) | Ti-6Al-7Nb Specification |
|---|
| Aluminum (Al) | 5.50 - 6.50 | | Niobium (Nb) | 6.50 - 7.50 | | Iron (Fe) | 0.25 max. | | Oxygen (O) | 0.20 max. | | Tantalum (Ta) | 0.50 max. | | Carbon (C) | 0.08 max. | | Nitrogen (N) | 0.05 max. | | Hydrogen (H) | 0.009 max. | | Titanium (Ti) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 4.52 g/cm³ | 0.163 lb/in³ | | Modulus of Elasticity | 105 - 115 GPa | 15.2 - 16.7 × 10⁶ psi | | Beta Transus | 940 - 990°C | 1725 - 1815°F |
| Mechanical Properties (Annealed) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 900 MPa | 130 ksi | | Yield Strength (0.2% offset, min.) | 795 MPa | 115 ksi | | Elongation (min.) | 10% | 10% | | Hardness | 36 HRC (approx.) | 36 HRC |
2. Fabrication & Material ComparisonMelting Process: Vacuum arc melting (VAM) and remelting ensures high purity, homogeneity, and absence of inclusions critical for medical implants . Annealing: Solution annealed at 700-760°C (1292-1400°F) followed by air cooling; relieves residual stresses while maintaining mechanical properties . Machining: Excellent machinability due to low interstitial control; produces consistent surface finish critical for implant applications . Forming: Good ductility permits cold forming for screws, plates, and wires; intermediate annealing may be required for severe deformation . Welding: Good weldability using GTAW with inert gas shielding; suitable for complex implant assemblies . Material Comparison: vs. Ti-6Al-4V ELI (ASTM F136): Comparable strength; superior corrosion resistance; vanadium-free for enhanced biocompatibility . vs. CP Titanium (Grade 2/4): Significantly higher strength (900 MPa vs. 345-550 MPa) for load-bearing applications . vs. CoCrMo (ASTM F75/F1537): Lower modulus (110 GPa vs. 210 GPa) reduces stress shielding; lighter weight . vs. Ti-6Al-7Nb vs. Ti-6Al-4V: Preferred in European and Asian markets where vanadium-free compositions are increasingly specified .
3. ApplicationsSpinal Devices: Rods, screws, cages, interbody fusion devices Joint Replacements: Hip stems, femoral components, knee tibial trays Fracture Fixation: Bone plates, screws, intramedullary nails, wires Dental Implants: Dental roots, abutments, prosthetic components Surgical Instruments: High-strength instruments requiring biocompatibility Cranial & Maxillofacial: Plates, mesh, screws for facial reconstruction
Contact ZYTC Alloy for certified Ti-6Al-7Nb materials with complete traceability, ASTM F1295/ISO 5832-11 specifications, technical datasheets, and competitive pricing on precision bar sizes. Email: daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
