ASTM B338 Gr 5 Titanium Alloy Tubes (UNS R56400)
ASTM B338 Grade 5 (UNS R56400), commonly known as Ti-6Al-4V, is the most widely used alpha-beta titanium alloy tubing specification. It offers an excellent balance of high strength, low density, superior corrosion resistance, and good fatigue properties. ASTM B338 Gr 5 titanium tubes are extensively used in demanding industries such as aerospace, chemical processing, marine, and medical due to their outstanding performance in extreme environments.
Key Features
- High strength-to-weight ratio
- Excellent corrosion resistance in oxidizing and marine environments
- Good weldability and fabrication characteristics
- Outstanding fatigue and creep resistance
- Suitable for high-temperature and high-stress applications
Sizes & Dimensions
| Outside Diameter (OD) | Wall Thickness | Length |
|---|---|---|
| 6 mm to 114.3 mm | 0.5 mm to 10 mm | Up to 6 meters |
| 1/4” to 4” | SCH 10, SCH 40, Custom | Fixed / Random / Cut Length |
Equivalent Grade
| Standard | Equivalent Grade |
|---|---|
| ASTM | ASTM B338 Grade 5 |
| UNS | R56400 |
| ISO | Ti-6Al-4V |
| AMS | AMS 4928 |
| DIN | 3.7165 |
| EN | EN 3.7164 |
ASTM B338 Gr 5 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Titanium (Ti) | Balance |
| Aluminum (Al) | 5.5 – 6.75 |
| Vanadium (V) | 3.5 – 4.5 |
| Iron (Fe) | ≤ 0.40 |
| Oxygen (O) | ≤ 0.20 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.05 |
| Hydrogen (H) | ≤ 0.015 |
Gr 5 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 895 MPa |
| Yield Strength | ≥ 828 MPa |
| Elongation | ≥ 10% |
| Hardness | ≤ 36 HRC |
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 |
| Electrical Resistivity | 1.71 µΩ·m |
Types
- Seamless Titanium Grade 5 Tubes
- Welded Titanium Grade 5 Tubes
- Precision Tubes
- Heat Exchanger Tubes
- Custom Fabricated Tubes
Applications
- Aerospace & aircraft structural components
- Chemical processing and heat exchangers
- Marine and offshore equipment
- Power generation systems
- Medical implants and surgical instruments
- Oil & gas and high-pressure piping systems
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