Titanium Grade 12 is a commercially pure–based alpha titanium alloy strengthened with small additions of molybdenum and nickel. It is often described as the industrial workhorse titanium alloy, offering improved strength, crevice corrosion resistance, and thermal stability compared to standard CP grades.
Material Classification
| UNS | R53400 |
|---|---|
| Alloy Type | Alpha Titanium Alloy (CP-Based) |
| Heat Treatable | No |
| Design Purpose | Improved corrosion resistance & moderate strength |
Metallurgical & Processing Characteristics
✔ Alpha-phase alloy with excellent microstructural stability
✔ Strengthened by alloying and cold work (not heat treatable)
✔ Outstanding weldability with no post-weld heat treatment
✔ Excellent formability, rolling, bending, and fabrication
✔ Good resistance to hydrogen embrittlement
Corrosion Resistance
Titanium Grade 12 offers superior resistance to seawater, brine, chlorides, and mild reducing acids. In many industrial environments, it outperforms Grade 2 and approaches Grade 7 and Grade 11 corrosion performance at a lower cost.
High-Temperature Performance
✔ Maintains strength up to ~300–350 °C
✔ Better creep resistance than CP titanium
✔ Stable during long-term thermal exposure
✔ Suitable for moderate high-temperature industrial service
Applications
Chemical & Process Industries: Heat exchangers, condensers, reactors, piping systems
Marine & Offshore: Seawater piping, desalination plants, offshore components
Oil & Gas: Sour service piping, downhole tubing, chemical injection lines
Power & Energy: FGD systems, cooling water systems, power plant heat exchangers
Industrial Equipment: Pressure vessels, fasteners in corrosive environments
Advantages
✔ Excellent resistance to chlorides and crevice corrosion
✔ Higher strength than CP titanium grades
✔ Outstanding weldability and fabrication ease
✔ Cost-effective alternative to structural titanium alloys
✔ Long service life with minimal maintenance
Grade Comparison
| Grade | Key Feature |
|---|---|
| Grade 2 | General corrosion resistance |
| Grade 12 | Improved corrosion + higher strength |
| Grade 11 | Pd-alloyed, higher corrosion resistance |
| Grade 7 | Maximum corrosion resistance |
| Grade 5 | High structural strength |
Summary:
Titanium Grade 12 (Ti-0.3Mo-0.8Ni) is a corrosion-resistant, moderately strong
alpha titanium alloy engineered for industrial, marine, chemical, and energy
applications. It offers an excellent balance of corrosion resistance, weldability,
strength, and cost, making it one of the most widely used titanium grades outside
aerospace.