ASTM F2066 specifies the requirements for wrought titanium-15 molybdenum alloy (Ti-15Mo) used in the manufacture of surgical implants. This beta titanium alloy is vanadium-free, offering a unique combination of low elastic modulus, high strength, excellent fatigue resistance, good ductility, superior corrosion resistance, and exceptional biocompatibility. Supplied in the beta-annealed condition, it is available in strip, sheet, plate, bar, and wire forms for orthopedics, trauma, spinal, orthodontic, and dental applications.
1. Product Specifications & Physical DataTi-15Mo is a beta-stabilized titanium alloy that achieves a range of mechanical properties through heat treatment. Its low modulus closely matches that of bone, reducing stress shielding in orthopedic implants. Available Forms: Strip, sheet, plate, bar, wire . Specifications: ASTM F2066, ISO 5832-14, UNS R58150 .
| Chemical Composition (Weight %) | Ti-15Mo Specification |
|---|
| Molybdenum (Mo) | 14.0 - 16.0 | | Iron (Fe) | 0.25 max. | | Oxygen (O) | 0.20 max. | | Carbon (C) | 0.10 max. | | Nitrogen (N) | 0.05 max. | | Hydrogen (H) | 0.015 max. | | Titanium (Ti) | Balance |
| Physical Properties | Metric | Imperial |
|---|
| Density | 4.95 - 5.00 g/cm³ | 0.179 - 0.181 lb/in³ | | Modulus of Elasticity | 75 - 85 GPa | 10.9 - 12.3 × 10⁶ psi | | Beta Transus | 740 - 760°C | 1365 - 1400°F |
| Mechanical Properties (Beta Annealed) | Metric | Imperial |
|---|
| Tensile Strength (min.) | 690 MPa | 100 ksi | | Yield Strength (0.2% offset, min.) | 620 MPa | 90 ksi | | Elongation (min.) | 15% | 15% | | Reduction of Area (min.) | 25% | 25% |
2. Operating Conditions & Selection CriteriaBiocompatibility: ASTM F2066 / ISO 5832-14 approved for surgical implants; vanadium-free eliminates potential toxicity concerns . Low Modulus: Elastic modulus (75-85 GPa) closely matches human bone (15-30 GPa) and is significantly lower than Ti-6Al-4V (110 GPa), reducing stress shielding and promoting bone remodeling . Corrosion Resistance: Exceptional resistance to physiological fluids; superior to CP titanium and comparable to Ti-6Al-4V . Fatigue Resistance: Excellent high-cycle fatigue strength essential for spinal rods, trauma plates, and orthopedic implants . Formability: Good ductility allows cold forming and complex shaping for patient-specific implants . Weldability: Excellent weldability with inert gas shielding; suitable for complex implant assemblies .
3. Fabrication & Material ComparisonBeta Annealing: 760-815°C (1400-1500°F), air cool; supplied in this condition for optimal properties . Solution Treatment: 800-850°C (1470-1560°F), water quench; produces beta phase structure . Aging: 450-550°C (840-1020°F) × 4-8 hours, air cool; increases strength through alpha precipitation . Cold Working: Good formability; can be cold rolled, drawn, and shaped . Machining: Similar to other beta titanium alloys; requires sharp tools, positive feeds, and adequate coolant .
| Material Comparison | Ti-15Mo | Ti-6Al-4V (ELI) | CP Titanium (Grade 4) | CoCrMo (ASTM F75) |
|---|
| Modulus of Elasticity | 75-85 GPa | 110 GPa | 105 GPa | 210 GPa | | Tensile Strength | 690 MPa | 860 MPa | 550 MPa | 655 MPa | | Yield Strength | 620 MPa | 795 MPa | 480 MPa | 450 MPa | | Vanadium Content | 0% | 3.5-4.5% | 0% | 0% | | MRI Compatibility | Excellent | Excellent | Excellent | Moderate | | Primary Use | Spinal, trauma, dental | Orthopedic implants | Non-load-bearing | Joint replacements |
4. ApplicationsOrthopedics: Spinal rods, interbody cages, fracture fixation plates, intramedullary nails Trauma: Bone plates, screws, fixation devices for fracture repair Spinal: Pedicle screws, rods, vertebral body replacements Dental: Dental implants, abutments, orthodontic wires Orthodontics: Archwires, brackets requiring low modulus and formability Cardiovascular: Guidewires, stents (select applications)
Contact ZYTC Alloy for certified ASTM F2066 Ti-15Mo medical titanium alloy with complete traceability, certificates, and competitive pricing. Available in strip, sheet, plate, bar, and wire for orthopedic, spinal, and dental implant applications. |
