ASTM B861 Gr 4 Titanium Pipe ( UNS R50700 )
ASTM B861 Grade 4 Titanium Pipe (UNS R50700) is a commercially pure titanium seamless pipe with the highest oxygen content among CP titanium grades, resulting in superior strength while retaining excellent corrosion resistance. This grade is ideal for applications requiring higher mechanical strength, pressure resistance, and durability in aggressive environments. ASTM B861 Gr 4 titanium pipes are widely used in industrial, chemical, and marine systems where long service life and performance reliability are essential.
Key Features
- Commercially Pure Titanium Grade 4
- Highest strength among CP titanium grades
- Excellent corrosion resistance in oxidizing environments
- High fatigue and pressure resistance
- Good weldability with proper procedures
- Lightweight and durable material
Equivalent Grade
| Standard | Equivalent |
|---|---|
| UNS | R50700 |
| ISO | Ti-Grade 4 |
| DIN | 3.7065 |
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 |
ASTM B861 Gr 4 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Titanium (Ti) | Balance |
| Iron (Fe) | Max 0.50 |
| Oxygen (O) | Max 0.40 |
| Carbon (C) | Max 0.08 |
| Nitrogen (N) | Max 0.05 |
| Hydrogen (H) | Max 0.015 |
Gr 4 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | Min 550 MPa |
| Yield Strength | Min 480 MPa |
| Elongation | Min 15% |
UNS R50700 Physical Properties
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ |
| Melting Point | 1668°C |
| Thermal Conductivity | 16.4 W/m·K |
| Modulus of Elasticity | 105 GPa |
Type of Grade 4 Pipes
- Seamless Grade 4 Titanium Pipe
- Annealed Titanium Pipe
- Heavy Wall Titanium Pipe
Application
- High-pressure chemical processing
- Heat exchangers and condensers
- Marine and offshore piping systems
- Power generation equipment
- Aerospace and industrial applications
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