ASTM F67 Gr2 Titanium Rod Description
ASTM F67 Gr2 titanium rod is a surgical implant-grade α-type commercially pure titanium rod, complying with ASTM F67 standard (for surgical implants), and it is a high-purity grade of industrial pure titanium widely used in medical and high-precision fields.
Chemical composition: Ti ≥ 99.2%, with low impurities (Fe, O, C, N, H), ensuring excellent biocompatibility.
Key characteristics: Excellent ductility and formability among commercial pure titanium; easy to cold-form, bend and weld; higher strength than Gr1, lower strength than Gr4; excellent corrosion resistance (especially to physiological fluids) and good low-temperature toughness (no cold brittleness).
Rod form: Mainly round rods (most common), square rods, hexagonal rods; produced by hot rolling, forging and cold drawing.
Main applications: Medical field (load-bearing and non-load-bearing bone plates, bone nails, dental implants, orthodontic wires, surgical instruments); aerospace field (ultra-low temperature structural parts, precision non-magnetic components, lightweight structural parts); industrial field (corrosion-resistant components in chemical and marine environments).
Technical Specifications
Chemical Specification
| Elements | Ti (Bal.) | O | Fe | C | N | H | Other impurities |
| Max. content | ≥99.2% | ≤0.25 | ≤0.30 | ≤0.10 | ≤0.05 | ≤0.015 | ≤0.40 |
Physical Specification
| Mechanical properties | Standard | Physical properties | Value | Service performance | Property features |
| Tensile strength | ≥440 MPa | Density | 4.51 g/cm³ | Weldability | Excellent |
| Yield strength | ≥275 MPa | Melt point | Around 1668 ℃ | Machinability | Excellent |
| Elongation | ≥18% | Elastic modulus | 9 GPa | Corrosion resistance | Good |
| Hardness | 160-220 HV | Thermal conductivity | Around 17 W/(m・K) | Low temperature performance | Good |
Features & Advantages
- Higher mechanical strength and yield strength than Gr1, balanced with sufficient ductility for structural loading applications.
- Better wear resistance and moderate hardness compared to soft Grade 1 pure titanium, suitable for precision machining parts.
- Maintains excellent overall corrosion resistance equal to Gr1, outstanding resistance to seawater, chloride and chemical corrosive media.
- Superior low-temperature toughness and structural stability, no cold brittleness, more reliable for cryogenic working conditions than Gr1.
- Easier forming and welding performance with fewer processing limitations, better adaptability for hot and cold forming than Grade 1.
- More cost-effective comprehensive performance, filling the performance gap between soft Gr1 and high-strength titanium grades for industrial and medical general use.
Performance Solution
Problem: Stainless steel and other medical alloys have high elastic modulus, easily cause stress shielding, bone resorption and implant loosening.
Solution: Medical Gr2 titanium has a modulus close to human bone, reduces stress shielding and ensures long-term implantation stability.
Problem: Common metals are vulnerable to bodily fluid corrosion, leading to metal precipitation, inflammation and allergic reactions after long-term implantation.
Solution: Gr2 titanium forms a stable passive oxide film, with excellent biocompatibility and corrosion resistance against human tissue fluids.
Problem: Grade 1 pure titanium is too soft with insufficient strength, easy to deform and bend under force, not applicable for load-bearing medical parts.
Solution: Gr2 features higher strength and yield strength than Gr1, perfectly suitable for stressed and load-bearing implant scenarios.
Problem: Grade 1 titanium has poor wear resistance, resulting in surface wear and particle shedding during frequent use.
Solution: Gr2 owns moderate hardness and better wear resistance than Gr1, extending service life of repetitive medical devices.
Problem: Ferromagnetic metals will interfere with MRI and CT examinations, bringing diagnostic risks and safety hazards.
Solution: Gr2 medical titanium is non-magnetic, fully compatible with nuclear magnetic and radiological examinations.
Problem: Traditional alloy materials have poor histocompatibility, easily cause rejection, redness and postoperative infection.
Solution: Compliant with ASTM F67 standard, Gr2 titanium is non-toxic and biologically inert, effectively lowering postoperative rejection risks.
Problem: Ordinary metal materials become brittle at low temperatures and may crack during medical cold sterilization.
Solution: Gr2 titanium possesses outstanding low-temperature toughness without cold brittleness, adapting to various medical disinfection environments.
Problem: High-density metal implants bring extra weight burden and slow down patient rehabilitation.
Solution: Gr2 titanium is lightweight with low density, reducing physical burden and accelerating postoperative recovery.
Application
1. Minimally Invasive Orthopedic Fixation Components
Gr2 titanium is used for thin bone plates, micro screws and small fixation nails. Its moderate strength and ductility avoid bone damage, ideal for delicate minimally invasive surgery.
2. Dental Implant Base & Custom Prosthodontic Frameworks
Applied to tooth root bases, denture brackets and orthodontic structural parts. Excellent biocompatibility prevents gum irritation and long-term oral fluid corrosion.
3. Reconstructive Craniofacial & Maxillofacial Implants
Suitable for orbital, nasal and jaw repair prostheses. It features low density and good formability for personalized shaping to fit complex facial anatomy.
4. Surgical Disposable & Reusable Precision Instrument Parts
Used for forceps tips, needle holders and minimally invasive surgical accessory components. It is lightweight, corrosion-resistant to high-temperature disinfection and medical disinfectants.
5. Cardiovascular & Soft Tissue Support Components
Manufactures vascular clip brackets and soft tissue protective supports. Non-magnetic and inert, it reduces tissue compression and chronic inflammation risks.
6. Veterinary High-End Implant & Pet Orthopedic Devices
Specially for small animal fracture fixation, joint prostheses and pet surgical implants. Balanced strength compared with Gr1 meets animal daily activity load demands.
7. MRI-Compatible Non-Magnetic Medical Structural Parts
Produces radiation therapy positioning brackets and diagnostic auxiliary fixtures. Completely non-magnetic, no imaging distortion or safety risks in nuclear magnetic environments.
8. Cryogenic Medical Device & Low-Temperature Sterilization Accessories
Applied to components for cryosurgery equipment and cold disinfection devices. Superior low-temperature toughness prevents brittle fracture under long-term ultra-low temperature working conditions.