Titanium Grade 28, also known as Ti-15V-3Al-3Cr-3Sn, is a titanium alloy known for its high strength-to-weight ratio, corrosion resistance, and excellent creep resistance at elevated temperatures. Here are the key characteristics and typical applications of Grade 28 Titanium:

Ⅰ. Key Characteristics

① Composition: Alloyed with 15% vanadium, 3% aluminum, 3% chromium, and 3% tin.

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 and high-temperature oxidizing atmospheres, due to the addition of chromium.

④ Creep Resistance: Excellent resistance to creep deformation at high temperatures, making it suitable for applications under sustained loads.

⑤ Heat Resistance: Maintains mechanical properties at elevated temperatures, suitable for aerospace and high-temperature applications.

⑥ Weldability: Good weldability, suitable for various fabrication processes.

⑦ Ductility: Good ductility, allowing for ease of forming and shaping.

Ⅱ. Typical Applications

① Aerospace: Used in aircraft components such as airframes, landing gear, and engine parts due to its high strength-to-weight ratio, corrosion resistance, and creep resistance.

② Gas Turbines: Used in gas turbine engine components where high strength and heat resistance are critical.

③ Marine: Suitable for marine applications, including seawater piping, fittings, and marine hardware, due to its corrosion resistance.

④ Industrial: Utilized in chemical processing equipment, oil and gas industry components, and power generation where corrosion resistance and high strength are critical.

⑤ Automotive: Used in automotive components such as valves, springs, and exhaust systems where high strength and heat resistance are required.

Ⅲ. Physical and Mechanical Properties

① Density: Approximately 4.48 g/cm³

② Tensile Strength: Typically around 1100 MPa (160 ksi)

③ Yield Strength: Approximately 1000 MPa (145 ksi)

④ Elongation: About 10-15% in 2 inches

⑤ Modulus of Elasticity: 105 GPa (15.2 Msi)

Titanium Grade 28 (Ti-15V-3Al-3Cr-3Sn) is an advanced titanium alloy suited for demanding aerospace, marine, and industrial applications where a combination of high strength, corrosion resistance, heat resistance, and creep resistance is required. Its use is specialized and typically found in industries requiring high-performance materials capable of withstanding extreme conditions.