ASTM B861 Gr 5 Titanium Pipe Ti-6Al-4V (UNS R56400)
ASTM B861 Gr 5 Titanium Pipe, commonly known as Ti-6Al-4V (UNS R56400), is the most widely used titanium alloy for seamless pipe applications. This alpha-beta titanium alloy contains aluminum and vanadium, which significantly enhance its strength, fatigue resistance, and heat resistance compared to commercially pure titanium grades. ASTM B861 Gr 5 titanium pipes combine exceptional mechanical strength with excellent corrosion resistance and a high strength-to-weight ratio, making them ideal for demanding aerospace, marine, chemical, and industrial environments where performance and reliability are critical.
Key Features
- Titanium alloy Ti-6Al-4V (Grade 5)
- Superior strength compared to CP titanium grades
- Excellent corrosion and oxidation resistance
- Outstanding strength-to-weight ratio
- Good fatigue and creep resistance
- Suitable for elevated temperature service
Equivalent Grade
| Standard | Equivalent |
|---|---|
| UNS | R56400 |
| AMS | AMS 4928 |
| ISO | Ti-6Al-4V |
| DIN | 3.7165 |
Sizes
| Parameter | Range |
|---|---|
| Outside Diameter | 6 mm to 219 mm |
| Wall Thickness | 0.5 mm to 12 mm |
| Length | Random / Cut Length |
| Schedule | As per customer requirement |
Gr 5 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Titanium (Ti) | Balance |
| Aluminum (Al) | 5.5 – 6.75 |
| Vanadium (V) | 3.5 – 4.5 |
| Iron (Fe) | Max 0.40 |
| Oxygen (O) | Max 0.20 |
| Carbon (C) | Max 0.08 |
| Nitrogen (N) | Max 0.05 |
| Hydrogen (H) | Max 0.015 |
Gr 5 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | Min 895 MPa |
| Yield Strength | Min 828 MPa |
| Elongation | Min 10% |
UNS R56400 Physical Properties
| Property | Value |
|---|---|
| Density | 4.43 g/cm³ |
| Melting Point | 1604 – 1660°C |
| Thermal Conductivity | 6.7 W/m·K |
| Modulus of Elasticity | 113 GPa |
Type of ASTM B861 Gr 5 Pipes
- Seamless Gr 5 Titanium Pipe
- Annealed Titanium Alloy Pipe
- Precision Ti-6Al-4V Tubing
- Heavy Wall Titanium Pipe
Application
- Aerospace and aircraft components
- Medical and biomedical equipment
- Chemical and petrochemical processing
- Marine and offshore systems
- High-performance industrial piping
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