Titanium Grade 5 and Grade 23
Titanium Grade 5 and Grade 23 are high-performance titanium alloys widely recognized for their exceptional strength, corrosion resistance, and biocompatibility. Both grades are part of the Ti-6Al-4V family and share similar properties, with Grade 23 being a specialized variant for medical and implant applications.
Titanium Grade 5 (Ti-6Al-4V): The Workhorse Alloy
Titanium Grade 5 is the most commonly used titanium alloy, offering a combination of high strength, lightweight properties, and excellent corrosion resistance. It is widely utilized in aerospace, automotive, marine, and industrial applications.
Key Features of Titanium Grade 5
- High Strength-to-Weight Ratio: Offers excellent mechanical strength while remaining lightweight.
- Corrosion Resistance: Exceptional resistance to corrosive environments, including seawater and industrial chemicals.
- Versatility: Excellent machinability and weldability, making it suitable for complex designs.
- Thermal Stability: Can operate at temperatures up to 400°C (752°F).
- Wear Resistance: Superior to commercially pure titanium grades, suitable for demanding applications.
Chemical Composition of Titanium Grade 5
Element | Percentage |
Titanium (Ti) | Balance |
Aluminum (Al) | 5.5-6.75 |
Vanadium (V) | 3.5-4.5 |
Iron (Fe) | 0.40 (maximum) |
Oxygen (O) | 0.20 (maximum) |
Carbon (C) | 0.08 (maximum) |
Nitrogen (N) | 0.05 (maximum) |
Hydrogen (H) | 0.015 (maximum) |
Titanium Grade 23 (Ti-6Al-4V ELI): For Medical Applications
Titanium Grade 23, also known as Ti-6Al-4V ELI (Extra Low Interstitial), is a variant of Grade 5 specifically designed for applications requiring superior biocompatibility and lower levels of impurities. It is primarily used in medical, dental, and aerospace applications.
Key Features of Titanium Grade 23
- Biocompatibility: Meets stringent medical standards, making it ideal for implants and surgical instruments.
- Low Impurity Levels: Extra low interstitial elements improve ductility and fracture toughness.
- Corrosion Resistance: Exceptional resistance to body fluids, preventing reactions and corrosion.
- Fatigue Strength: Excellent resistance to fatigue under cyclic loading, crucial for medical implants.
- Ease of Sterilization: Can withstand multiple sterilization cycles without degradation.
Chemical Composition of Titanium Grade 23
Element | Percentage |
Titanium (Ti) | Balance |
Aluminum (Al) | 5.5-6.5 |
Vanadium (V) | 3.5-4.5 |
Iron (Fe) | 0.25 (maximum) |
Oxygen (O) | 0.13 (maximum) |
Carbon (C) | 0.08 (maximum) |
Nitrogen (N) | 0.03 (maximum) |
Hydrogen (H) | 0.0125 (maximum) |
Applications
Titanium Grade 5
- Aerospace: Jet engines, airframes, and landing gear components.
- Marine: Offshore platforms, propellers, and seawater piping.
- Automotive: Performance exhaust systems, suspension components, and sports car frames.
- Energy: Turbine blades, heat exchangers, and pressure vessels.
- Industrial: Chemical processing equipment and tools.
Titanium Grade 23
- Medical: Orthopedic implants, dental implants, and surgical tools.
- Aerospace: Components requiring higher ductility and toughness.
- Dental: Crowns, bridges, and abutments for dental prosthetics.
- Biomedical: Implantable devices like pacemaker casings.
Mechanical Properties
Property | Grade 5 (Ti-6Al-4V) | Grade 23 (Ti-6Al-4V ELI) |
Tensile Strength | 895 MPa (130 ksi) | 860 MPa (125 ksi) |
Yield Strength | 825 MPa (120 ksi) | 795 MPa (115 ksi) |
Elongation | 10% | 15% |
Hardness | 36 HRC | 30 HRC |
Available Forms
- Sheets and Plates: For aerospace, marine, and industrial applications.
- Bars and Rods: Ideal for machining and structural uses.
- Pipes and Tubes: Used in the transport of corrosive or high-temperature substances.
- Fittings: Customizable for piping systems.
- Wires: Precision materials for dental and medical applications.
- Forgings: Specialized shapes for aerospace and industrial needs.
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