ASTM B338 Grade 23 Titanium Tube (UNS R56407)
ASTM B338 Gr 23 Titanium Tube (UNS R56407) is an Extra Low Interstitial (ELI) version of Grade 5 Ti-6Al-4V alloy. With reduced oxygen, nitrogen, and carbon levels, Grade 23 offers superior fracture toughness, improved ductility, and excellent corrosion resistance. These properties make it ideal for critical aerospace components and biomedical applications.
Key Features
- Manufactured in accordance with ASTM B338
- UNS R56407 Ti-6Al-4V ELI alloy
- Extra low interstitial chemistry for enhanced toughness
- Excellent corrosion and fatigue resistance
- Superior biocompatibility
- Good weldability and formability
- Reliable performance at low and elevated temperatures
Equivalent Grade
| Standard | Equivalent Grade |
|---|---|
| ASTM | ASTM B338 Grade 23 |
| UNS | R56407 |
| ISO | Ti-6Al-4V ELI |
| AMS | AMS 4931 |
| DIN | 3.7165 (ELI) |
| EN | EN 3.7164 ELI |
ASTM B338 Gr 23 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Titanium (Ti) | Balance |
| Aluminum (Al) | 5.5 – 6.5 |
| Vanadium (V) | 3.5 – 4.5 |
| Iron (Fe) | ≤ 0.25 |
| Oxygen (O) | ≤ 0.13 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.03 |
| Hydrogen (H) | ≤ 0.012 |
Gr 23 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 860 MPa |
| Yield Strength | ≥ 795 MPa |
| Elongation | ≥ 10% |
| Hardness | ≤ 36 HRC |
UNS R56407 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 |
Type of ASTM B338 Gr 23 Pipes
- Seamless Titanium Grade 23 Tubes
- Welded Titanium Grade 23 Tubes
- Medical-grade precision tubes
- Aerospace hydraulic tubes
- Custom fabricated tubes
Applications
- Medical implants and surgical instruments
- Aerospace and aircraft structural components
- Cryogenic applications
- Chemical processing equipment
- Marine and offshore systems
- High-performance motorsport components
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