UNS R56323 / Grade 28 Ti 3Al 2.5V 0.1Ru Titanium Alloy
Grade 28 Ti-3Al-2.5V-0.1Ru alloy is a ruthenium-enhanced version of grade Ti-3Al-2.5V with similar physical and mechanical properties. Ruthenium provides this alloy with improved corrosion resistance. This alloy provides high resistance to dilute reducing acids and crevice corrosion in hot halide (brine) solution. It has been approved for use in sour service under the NACE MR-01-75 Standard.
Chemical Composition
Element | Content (%) |
Titanium, Ti | 92.435 - 95.42 |
Aluminum, Al | 2.5 - 3.5 |
Vanadium, V | 2-3 |
Ruthenium, Ru | 0.080 - 0.14 |
Iron, Fe | ≤ 0.25 |
Oxygen, O | ≤ 0.15 |
Carbon, C | ≤ 0.080 |
Nitrogen, N | ≤ 0.030 |
Hydrogen, H | ≤ 0.015 |
Other, each | ≤ 0.10 |
Other, total | ≤ 0.40 |
Physical Properties
Properties | Metric | Imperial |
Density | 4.48 g/cm3 | 0.161 lb/in3 |
Melting point | 1700°C | 3092°F |
Mechanical Properties
Properties | Metric | Imperial |
Tensile strength | 620 MPa | 90 ksi |
Yield strength | 483 MPa | 70 ksi |
Poisson's ratio | 0.34 | 0.34 |
Elastic modulus | 107 GPa | 15519 ksi |
Hardness (HV) | 260-320 | 260-320 |
Applications
Grade 28 Ti-3Al-2.5V-0.1Ru alloy finds use in:
- Seawater applications
- High crevice corrosion temperature environment.
