Titanium Grade 23, also known as Ti-6Al-4V ELI (Extra Low Interstitials), is a highly popular titanium alloy known for its exceptional strength, biocompatibility, and corrosion resistance. Here are the key characteristics and typical applications of Grade 23 Titanium:

Ⅰ. Key Characteristics

① Composition: Alloyed with 6% aluminum and 4% vanadium, with reduced levels of interstitial elements (especially oxygen and iron) compared to standard Ti-6Al-4V.

② Strength: High tensile and yield strength, significantly stronger than commercially pure titanium grades.

③ Corrosion Resistance: Excellent resistance to corrosion in various environments, including seawater, acids, and physiological fluids.

④ Biocompatibility: Excellent biocompatibility, making it suitable for medical implants and surgical instruments.

⑤ Weldability: Good weldability, suitable for various fabrication processes.

⑥ Ductility: Good ductility, allowing for ease of forming and shaping.

⑦ Fatigue Resistance: Good fatigue resistance, suitable for implants subjected to cyclic loading.

Ⅱ. Typical Applications

① Medical: Widely used in medical implants such as orthopedic implants (hip and knee replacements), dental implants, spinal implants, and surgical instruments due to its biocompatibility and strength.

② Dental: Used in dental implants and orthodontic devices where biocompatibility and strength are required.

③ Aerospace: Used in aircraft components such as airframes, landing gear, and engine parts due to its high strength-to-weight ratio and corrosion resistance.

④ Marine: Suitable for marine applications, including seawater piping, fittings, and marine hardware, due to its corrosion resistance.

⑤ Industrial: Utilized in various industrial applications requiring high strength and corrosion resistance, such as chemical processing equipment and offshore structures.

Ⅲ. Physical and Mechanical Properties

① Density: Approximately 4.43 g/cm³

② Tensile Strength: Typically around 900 MPa (130 ksi)

③ Yield Strength: Approximately 800 MPa (116 ksi)

④ Elongation: About 10-15% in 2 inches

⑤ Modulus of Elasticity: 110 GPa (16 Msi)

Titanium Grade 23 (Ti-6Al-4V ELI) is a versatile titanium alloy that finds extensive use in both medical and aerospace industries due to its combination of strength, corrosion resistance, and biocompatibility. Its popularity stems from its ability to meet stringent requirements for implants while also being suitable for high-performance aerospace applications.