Titanium Grade 9, also known as Ti-3Al-2.5V-0.05Pd, is an alpha-beta titanium alloy that includes small amounts of palladium. This grade offers excellent corrosion resistance, good weldability, and moderate strength. Here are the key characteristics and typical applications of Grade 9 Titanium:

Ⅰ. Key Characteristics

① Composition: Alloyed with 3% aluminum, 2.5% vanadium, and 0.05% palladium.

② Corrosion Resistance: Excellent resistance to corrosion in a wide range of environments, including seawater and chlorides, due to the addition of palladium.

③ Strength: Moderate strength, higher than commercially pure titanium grades but lower than some other titanium alloys like Grade 5.

④ Weldability: Good weldability, allowing for ease of fabrication and welding.

⑤ Ductility: Good ductility, which facilitates forming and shaping processes.

⑥ Biocompatibility: Non-toxic and biocompatible, suitable for medical applications.

Ⅱ. Typical Applications

① Aerospace: Used in aircraft components where corrosion resistance and moderate strength are required, such as airframes and hydraulic tubing.

② Marine: Ideal for marine applications, including seawater piping, fittings, and marine hardware, due to its corrosion resistance.

③ Medical: Suitable for medical implants and devices where biocompatibility and corrosion resistance are critical factors.

④ Automotive: Utilized in automotive components, such as exhaust systems and lightweight structures, for its strength and corrosion resistance.

⑤ Sporting Goods: Found in sports equipment like bicycle frames and golf clubs due to its lightweight and durability.

⑥ Industrial: Used in chemical processing equipment, power generation, and other industrial applications requiring corrosion resistance and moderate strength.

Ⅲ. Physical and Mechanical Properties

① Density: Approximately 4.48 g/cm³

② Tensile Strength: Around 620 MPa (90 ksi)

③ Yield Strength: Approximately 483 MPa (70 ksi)

④ Elongation: About 15% in 2 inches

⑤ Modulus of Elasticity: 105 GPa (15.2 Msi)

Grade 9 Titanium (Ti-3Al-2.5V-0.05Pd) is chosen for applications where a balance of corrosion resistance, strength, and weldability is required. The addition of palladium enhances its resistance to corrosion, particularly in challenging environments, making it suitable for diverse industrial and specialized applications.