Gr5 Titanium Tube

Introduction

Grade 5 titanium alloy (Ti-6Al-4V) is the most widely used titanium alloy, known for its excellent combination of high strength, low density, and outstanding corrosion resistance. It also offers good weldability and excellent performance at both elevated and moderately low temperatures.

Grade 5 titanium tubes are widely used in aerospace, petroleum, marine engineering, and high-performance structural applications.

Size Range

Custom dimensions are available according to customer requirements.

Typical Sizes and Applications

Examples of commonly used dimensions:

Production Process

Grade 5 titanium tubes are typically manufactured through hot extrusion and rolling processes, especially for high-strength thick-walled pipes.

For shorter tube lengths, production methods may include:

Forging followed by turning

Deep-hole drilling from forged rods followed by external machining

The deep-hole drilling process can produce titanium tubes with lengths up to 3 meters.

Manufacturing Route

Typical production flow for Grade 5 titanium tubes:

Grade 5 titanium ingot
double vacuum consumable electrode melting (VAR)
forged billet
extrusion tube billet
online straightening
acid pickling and surface descaling
internal and external machining
finished Grade 5 titanium alloy tubes

Manufacturing Considerations

Titanium alloys have low thermal conductivity, which results in significant temperature differences between the surface and the core of the billet during hot forming. This may lead to:

• uneven metal flow

• surface tensile stress

• surface cracking in severe cases

During extrusion, titanium alloy tubes are also sensitive to thermal effects, which may cause overheating and affect the final microstructure and mechanical properties. Therefore, careful control of extrusion parameters is essential.

For example, a Φ140 × 4 × 4000 mm titanium alloy tube may be produced with:

• extrusion ratio: 3 – 10

• extrusion speed: 50 – 120 mm/s

Proper parameter control helps prevent thermal defects and ensures stable product performance.

Applications

With the expansion of oil and natural gas exploration, demand for large-diameter extruded titanium alloy pipes continues to grow.

Typical applications include:

Oil & Gas Industry

• oil well tubing

• geothermal well pipelines

• natural gas pipelines

Offshore and Subsea Engineering

Large-diameter titanium alloy pipes are used for offshore drilling and subsea oil extraction.

Examples include:

Φ48 – Φ610 × 26 × 2600 mm Grade 5 titanium pipe used for geothermal and offshore drilling pipelines in the United States

Φ650 × (22–25) × 35000 mm Grade 9 (Ti-3Al-2.5V) titanium pipe used for subsea oil extraction systems

Φ600 × 25 × 1500 mm Grade 23 (Ti-6Al-4V ELI) titanium pipe used in the riser systems of North Sea offshore drilling platforms

Russian VSMPO also produces Grade 5 titanium alloy pipes for oil extraction applications.