ASTM B338 Grade 2 Pipe (UNS R50400)
ASTM B338 Gr 2 specifies seamless and welded pipes manufactured from commercially pure titanium, designated as UNS R50400. Titanium Grade 2 is the most widely used titanium grade due to its excellent balance of strength, corrosion resistance, and formability.
Grade 2 titanium pipes provide outstanding resistance to seawater, chlorides, and many corrosive chemicals, making them suitable for demanding industrial, chemical processing, and marine environments.
Key Features
- Excellent corrosion resistance in seawater and chloride environments
- High strength-to-weight ratio
- Good ductility and formability
- Outstanding resistance to erosion and biofouling
- Non-magnetic and non-toxic
- Excellent weldability and fabrication properties
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | R50400 |
| ASTM | Titanium Grade 2 |
| EN | 3.7035 |
| DIN | Ti 99.2 |
| JIS | TP340 |
ASTM B338 Gr 2 Chemical Composition (%)
| Element | Content (%) |
|---|---|
| Titanium (Ti) | Balance |
| Iron (Fe) | ≤ 0.30 |
| Oxygen (O) | ≤ 0.25 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.03 |
| Hydrogen (H) | ≤ 0.015 |
Gr 2 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 345 MPa (min) |
| Yield Strength (0.2% Proof) | 275 MPa (min) |
| Elongation | 20% (min) |
| Hardness | ≤ 90 HRB |
UNS R50400 Physical Properties
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ |
| Melting Point | 1668°C |
| Thermal Conductivity | 21.9 W/m·K |
| Electrical Resistivity | 0.42 µΩ·m |
| Modulus of Elasticity | 105 GPa |
Type of ASTM B338 Gr 2 Pipe
- Gr 2 Seamless Pipe
- Gr 2 Welded Pipe
- Heat Exchanger Tubes
- Condenser Tubes
- Chemical Process Pipes
- Marine Grade Titanium Pipes
Applications
- Heat exchangers and condensers
- Chemical processing equipment
- Seawater piping systems
- Desalination plants
- Marine and offshore applications
- Power generation plants
- Aerospace and industrial systems
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