Titanium Grade 5 Tube Sheet
Alloyed with aluminum and vanadium for roughly triple the yield strength of commercially pure Grade 2 — reached for when titanium's weight and corrosion advantages are needed alongside a genuine structural strength requirement.
Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| Aluminum (Al) | 5.5 | 6.75 |
| Vanadium (V) | 3.5 | 4.5 |
| Iron (Fe) | — | 0.40 |
| Oxygen (O) | — | 0.20 |
| Titanium (Ti) | Balance | — |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 895 MPa min |
| Yield Strength (0.2% offset) | 828 MPa min |
| Elongation | 10% min |
| Density | 4.43 g/cm³ |
Equivalent Grades
| Standard | Designation |
|---|---|
| ASTM / UNS | R56400 |
| EN / DIN | 3.7165 |
| Common Name | Ti-6Al-4V |
Grade 5 vs. Grade 2 — Which One
See the full Titanium Grade 2 datasheet for the commercially pure grade used in most tube sheet applications.
Applications
Specialty tube sheets where a genuine structural strength requirement exists beyond what commercially pure Grade 2 provides — high-pressure seawater service with unusually demanding mechanical loading, or applications where minimizing thickness for weight is critical enough to justify the strength premium.
Advantages & Limitations
Advantages
- ~3x the yield strength of Grade 2
- Retains titanium's excellent seawater and chlorine resistance
- Good strength-to-weight even compared to duplex steel
Limitations
- Lower ductility and more demanding weld procedures than Grade 2
- Higher cost and longer lead time than Grade 2
- Overkill for most standard tube sheet pressure/thickness requirements
FAQ
No — the majority of titanium tube sheet applications are adequately served by Grade 2, since the pressure/thickness calculation rarely demands Grade 5's extra strength. Grade 5 is reserved for cases with an explicit structural driver beyond standard pressure-boundary design.
Yes — Grade 5's alloying makes it more sensitive to welding parameters and generally results in lower ductility in the weld zone compared to Grade 2's straightforward weldability. Both still require the same inert gas shielding discipline as any titanium welding.
Grade 5 is typically sourced to order given its more specialized demand profile compared to Grade 2 — send your specification and quantity for a confirmed lead time.