Titanium Grade 19, also known as Ti-3Al-8V-6Cr-4Zr-4Mo, is a titanium alloy known for its exceptional strength, corrosion resistance, and heat resistance. This alloy is primarily used in aerospace applications where high-performance materials are required. Here are the key characteristics and typical applications of Grade 19 Titanium:

Ⅰ. Key Characteristics

① Composition: Alloyed with 3% aluminum, 8% vanadium, 6% chromium, 4% zirconium, and 4% molybdenum.

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 high-temperature oxidizing atmospheres, enhanced by the addition of chromium and molybdenum.

④ Heat Resistance: Maintains mechanical properties at elevated temperatures, suitable for applications requiring heat resistance.

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

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

⑦ Biocompatibility: Non-toxic and biocompatible, suitable for medical applications with appropriate surface treatments.

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, heat resistance, and corrosion resistance.

② Marine: Suitable for marine applications, including seawater piping, fittings, and offshore structures, due to its corrosion resistance.

③ Chemical Processing: Used in chemical processing equipment, including reactors, heat exchangers, and piping systems where corrosion resistance to acids and chlorides is critical.

④ Medical: Used in medical implants and devices where high strength, corrosion resistance, and biocompatibility are essential.

⑤ Industrial: Utilized in various industrial applications requiring high strength and corrosion resistance, such as power generation, oil and gas industry components, and desalination plants.

Ⅲ. Physical and Mechanical Properties

① Density: Approximately 4.5 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: 110 GPa (16 Msi)

Grade 19 Titanium (Ti-3Al-8V-6Cr-4Zr-4Mo) is an advanced titanium alloy suited for demanding aerospace and industrial applications where a combination of high strength, corrosion resistance, heat resistance, and stability at elevated temperatures is required. Its use is specialized and typically found in industries requiring high-performance materials capable of withstanding extreme conditions.