ASTM B338 Grade 12 Titanium Tube (UNS R53400)
ASTM B338 Gr 12 Titanium Tube (UNS R53400) is a corrosion-resistant titanium alloy containing molybdenum and nickel (Ti-0.3Mo-0.8Ni). It offers higher strength than commercially pure titanium while maintaining excellent weldability and outstanding resistance to crevice corrosion, pitting, and stress corrosion cracking, especially in chloride-bearing environments.
Key Features
- Manufactured in accordance with ASTM B338
- UNS R53400 titanium alloy composition
- Excellent resistance to crevice and pitting corrosion
- Superior weldability compared to higher-alloyed grades
- Good strength with excellent ductility
- Suitable for marine, chemical, and heat exchanger services
Equivalent Grade
| Standard | Equivalent Grade |
|---|---|
| ASTM | ASTM B338 Grade 12 |
| UNS | R53400 |
| ISO | Ti-0.3Mo-0.8Ni |
| AMS | AMS 4945 |
| DIN | 3.7100 |
| EN | EN 3.7103 |
ASTM B338 Gr 12 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Titanium (Ti) | Balance |
| Molybdenum (Mo) | 0.2 – 0.4 |
| Nickel (Ni) | 0.6 – 0.9 |
| Iron (Fe) | ≤ 0.30 |
| Oxygen (O) | ≤ 0.25 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.03 |
| Hydrogen (H) | ≤ 0.015 |
Gr 12 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 483 MPa |
| Yield Strength | ≥ 345 MPa |
| Elongation | ≥ 18% |
| Hardness | ≤ 30 HRC |
UNS R53400 Physical Properties
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ |
| Melting Point | 1604 – 1660°C |
| Thermal Conductivity | 16.4 W/m·K |
| Modulus of Elasticity | 105 GPa |
| Electrical Resistivity | 0.55 µΩ·m |
Type of ASTM B338 Gr 12 Pipes
- Seamless Titanium Grade 12 Tubes
- Welded Titanium Grade 12 Tubes
- Heat Exchanger Tubes
- Condenser Tubes
- Custom Fabricated Tubes
Applications
- Chemical processing equipment
- Marine and offshore heat exchangers
- Desalination plants
- Power generation condensers
- Oil & gas piping systems
- Pulp and paper industry
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