Description
ASTM F67 Grade 4 Titanium Rod – High-Strength Medical Titanium for Critical Applications
The ASTM F67 Grade 4 Titanium Rod is a commercially pure titanium product developed specifically for high-stress and high-reliability applications. It is the strongest among the four unalloyed titanium grades (Grade 1–4) defined by the ASTM F67 specification, offering the ideal combination of biocompatibility, strength, corrosion resistance, and formability. This makes it especially valuable for medical implants, surgical instruments, and advanced industrial use where human safety and long-term performance are non-negotiable.
🔩 Product Overview
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Material: Commercially Pure Titanium
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Grade: Grade 4 (CP Titanium)
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Standard: ASTM F67
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Purity: ≥ 99.5%
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Form: Rod / Bar
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Condition: Annealed / Cold-Worked
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Surface Finish: Polished, Pickled, or Ground
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Custom Machining: Available per customer drawings
The ASTM F67 Grade 4 Titanium Rod is widely adopted in the medical industry due to its excellent compatibility with body tissues and fluids. Its non-toxic, non-reactive properties make it safe for long-term implantation in orthopedic, dental, and cardiovascular procedures.
⚙️ Key Mechanical & Physical Properties
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ |
| Tensile Strength | ≥ 550 MPa |
| Yield Strength | ≥ 485 MPa |
| Elongation | ≥ 15% |
| Elastic Modulus | ~105 GPa |
| Hardness | Rockwell C ~20 |
| Thermal Conductivity | ~16.4 W/m·K |
| Melting Point | ~1660°C |
These characteristics make Grade 4 titanium an excellent alternative to titanium alloys when high strength is required but alloying elements are undesirable—especially in biological settings.
🧪 Chemical Composition (Typical)
| Element | Max Weight % |
|---|---|
| Oxygen (O) | 0.40% |
| Carbon (C) | 0.08% |
| Nitrogen (N) | 0.05% |
| Hydrogen (H) | 0.015% |
| Iron (Fe) | 0.30% |
| Titanium (Ti) | Balance |
This composition complies with the strict limits set by the ASTM F67 specification to ensure safety, consistency, and performance in demanding environments.
🏥 Applications
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Orthopedic Implants: Hip joints, bone screws, spinal cages
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Dental Implants: Titanium posts, abutments
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Cardiovascular Devices: Pacemaker housings, heart valve frames
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Surgical Instruments: Forceps, scalpels, bone rasps
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Aerospace & Marine: High-strength non-magnetic structural components
The ASTM F67 Grade 4 Titanium Rod is not only medically compliant but also favored in aerospace and marine sectors due to its resistance to saltwater and oxidizing environments.
🛠️ Custom Fabrication & Support
Our titanium rods are available in:
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Diameters from 2 mm to 60 mm
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Lengths up to 3000 mm
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Tolerances: As per ISO 2768, or tighter upon request
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Surface options: Polished, matte, or CNC machined
Custom machining services are provided to support your project drawings or implant-ready geometries. We also offer COA (Certificate of Analysis) and MTC (Mill Test Certificate) upon shipment.
🌐 Reference & External Resources
🔬 Why ASTM F67 Grade 4 Titanium Rod Is Preferred in Medical Device Manufacturing
Unlike alloyed titanium such as Ti-6Al-4V (Grade 5), the ASTM F67 Grade 4 Titanium Rod offers a metallic purity advantage that is critical for sensitive biomedical applications. With no alloying elements that may cause allergic reactions or galvanic responses, Grade 4 titanium provides unmatched compatibility with the human body. It exhibits excellent tissue adhesion and osseointegration properties, making it highly suitable for load-bearing implants such as femoral nails, tibial rods, and spinal anchors.
Additionally, the cold-worked versions of ASTM F67 Grade 4 titanium can reach yield strengths beyond 600 MPa, enabling their use in weight-critical structural parts in both medical and aerospace systems. Its high fatigue resistance ensures long-term reliability in dynamic implant situations such as dental screw-retained prosthetics or trauma plates.
🧯 Corrosion & Biocompatibility Performance
The corrosion resistance of ASTM F67 Grade 4 Titanium Rod is another crucial factor for its wide adoption. It forms a dense and self-healing oxide layer (TiO₂) that protects it from degradation in environments such as blood, bodily fluids, saline water, and chlorides. This ensures the long service life of implanted components and minimizes ion release, a key criterion for FDA and CE compliance in medical device approvals.
In addition, its non-ferromagnetic nature ensures that it does not interfere with MRI diagnostics, which is vital for in-body applications.
🔍 Quality Assurance & Documentation
Every ASTM F67 Grade 4 Titanium Rod we supply undergoes rigorous non-destructive testing (NDT), including ultrasonic and eddy current inspections, to confirm dimensional uniformity, microstructural soundness, and absence of internal defects. We also provide optional:
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Ultrasonic Test Reports
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3.1 / 3.2 Certificates
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Raw material traceability
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RoHS / REACH compliance declarations
All rods are shipped with protective packaging to avoid surface contamination and are marked with batch numbers for complete traceability.
📦 Packaging & Shipping
Rods are vacuum-sealed or packed in oil-paper wrapping (as per application), and then stored in reinforced wooden cases to ensure safe international shipping. We offer air and sea delivery options with full customs clearance support.
📞 Contact Us
📧 Email: sales@niticu.com
📞 Phone / WhatsApp / WeChat: +86 13335373172
🏭 Factory: Baotai Road Industrial Park, High-tech Zone, Baoji City, Shaanxi, China
🌐 Website: https://niticu.com
📩 Contact us now for pricing, samples, and expert technical support — we respond within 24 hours.
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