ASTM F1472 Gr5 Titanium Rod Description
ASTM F1472 Gr5 titanium rod is a surgical implant-grade α+β dual-phase titanium alloy rod, complying with ASTM F1472 standard for medical implantation, and it is a high-strength titanium alloy widely applied in medical implants and high-performance precision industries.
Chemical composition: Ti as the balance, Al 5.5-6.75%, V 3.5-4.5%, with strictly controlled interstitial impurities (Fe, O, C, N, H), guaranteeing excellent biocompatibility and long-term in-vivo service safety.
Key characteristics: Outstanding strength-to-weight ratio among medical titanium materials; great tensile strength and fatigue resistance, far superior to commercial pure titanium Gr1, Gr2 and Gr4; moderate formability and favorable machinability; exceptional corrosion resistance against body fluids and harsh chemical media, as well as reliable structural stability under continuous high-load and moderate-temperature conditions.
Rod form: Available in round rods as the mainstream type, plus square rods and hexagonal rods; manufactured through hot forging, hot rolling and cold drawing processes.
Main applications: Medical field (orthopedic bone plates, high-strength bone screws, spinal implants, surgical implant components and medium-load medical devices); aerospace field (high-stress lightweight parts, engine fasteners, pressure-bearing structural components); industrial field (high-strength corrosion-resistant fittings for marine, chemical and extreme working environments).
Technical Specifications
Chemical Specification
| Elements | Ti | O | Al | V | Fe | C | N | H | Other impurities |
| Max. content | Balance | ≤0.20 | 5.5-6.75 | 3.5-4.5 | ≤0.30 | ≤0.08 | ≤0.05 | ≤0.015 | ≤0.40 |
Physical Specification
| Mechanical properties | Standard | Physical properties | Value |
| Tensile strength | ≥895 MPa | Density | 4.51 g/cm³ |
| Yield strength | ≥825 MPa | Melt point | Around 1668 ℃ |
| Elongation | ≥10% | – | – |
Features & Advantages
- More excellent fatigue performance: Compared with commercially pure titanium, the fatigue resistance of Gr5 medical titanium rods is significantly improved. It can adapt to the repeated stress impact caused by long-term human activities, especially suitable for long-term service implant components such as artificial joints and spinal fusion cages, extending the service life of implants.
- Better strength-to-weight ratio: While ensuring high strength, its density is similar to that of commercially pure titanium, and its specific strength is much higher than that of commercially pure titanium. It can be used to manufacture lightweight implants, reduce the burden on human tissues after implantation, and lower the difficulty of postoperative recovery, especially suitable for complex implantation scenarios in orthopedics and spinal surgery.
- Qualified biocompatibility and stronger adaptability: Like commercially pure titanium, it has excellent biocompatibility without rejection reactions. At the same time, its alloy components (Al, V) are strictly proportioned and controlled, and the impurity content meets medical standards. It is more suitable for long-term human implantation needs than commercially pure titanium, ensuring the safety of long-term service in the body.
- More outstanding corrosion resistance to body fluids: Compared with commercially pure titanium, Gr5 medical titanium rods have stronger corrosion resistance to human body fluids (blood, tissue fluid), which can effectively resist the erosion of electrolytes in body fluids, avoid oxidation and shedding of the implant surface, and reduce irritation to surrounding tissues.
- More flexible processing adaptability: Although the formability of commercially pure titanium is slightly better, Gr5 medical titanium rods have both moderate formability and good machinability. They can be accurately processed into implant components of complex shapes (such as personalized bone plates and dental abutments) to meet the diverse and customized needs of medical clinics.
- More reliable structural stability: Under human body temperature and long-term stress environment, the structural stability of Gr5 medical titanium rods is better than that of commercially pure titanium. It will not creep or deform due to long-term load, ensuring the fixed position of the implant, guaranteeing the treatment effect, and reducing the risk of secondary surgery.
Performance Solution
Problem: Commercially pure titanium Gr1/Gr2/Gr4 has low tensile strength, easy bending and fracture under high physical load in orthopedic implantation.
Solution: ASTM F1472 Gr5 titanium alloy features ultra-high mechanical strength, effectively resisting heavy load and permanent deformation for high-stress medical implants.
Problem: Gr1/Gr2/Gr4 pure titanium shows poor fatigue resistance, prone to metal fatigue failure after long-term human movement and cyclic stress.
Solution: Gr5 medical titanium rod owns outstanding fatigue performance, adapting to long-term dynamic load and extending in-vivo service life.
Problem: Gr1/Gr2/Gr4 pure titanium cannot meet the structural strength requirements of complex spinal and large joint implants, limiting clinical application.
Solution: With excellent strength-to-weight ratio, Gr5 realizes lightweight and high-strength integration, covering high-load implant scenarios that pure titanium cannot support.
Problem: Stainless steel medical materials are heavy, causing physical discomfort and slow postoperative recovery for patients.
Solution: Gr5 titanium rod is low-density and lightweight, reducing tissue compression and improving patient comfort and recovery efficiency.
Problem: Cobalt-chromium alloys have poor biocompatibility, easily causing tissue irritation and mild rejection reactions.
Solution: Gr5 medical grade titanium has stable biocompatibility, no cytotoxicity, and long-term safety in body fluid environment.
Problem: Common metal materials suffer from weak corrosion resistance, vulnerable to erosion by blood, tissue fluid and body electrolytes.
Solution: Gr5 possesses superior anti-corrosion property against body fluids, avoiding surface oxidation and metal ion precipitation.
Problem: Traditional hard implant materials are too rigid, leading to stress shielding and bone atrophy around the implant.
Solution: Gr5 has elastic modulus close to human bone, reducing stress shielding and protecting surrounding bone tissue.
Problem: Ordinary alloy materials have poor machinability, difficult to process into personalized and complex medical structural parts.
Solution: Gr5 titanium alloy balances formability and machinability, suitable for custom orthopedic parts, screws and precision surgical components.
Application
- High-load spinal implant solutions for severe spinal correction and long-term axial pressure bearing.
- Weight-bearing joint auxiliary fixation components for lower limb high-stress movement and cyclic fatigue conditions.
- Heavy-duty trauma orthopedic implants for comminuted fractures and high-strength bone reconstruction scenarios.
- Craniomaxillofacial structural reconstruction devices for complex facial and skull defect restoration.
- High-strength sports medicine fixation hardware for ligament repair and athletic injury stabilization.
- Long-term indwelling deep tissue structural implants with superior bodily fluid corrosion resistance.
- Premium veterinary orthopedic implants for large animals with heavy weight and high mechanical demands.
- High-precision minimally invasive surgical structural parts for compact, complex and high-rigidity medical devices.