Ti 3Al-2.5V is the hydraulic tubing alloy. It is significantly more formable and weldable than Ti 6Al-4V while carrying about twice the strength of commercially pure titanium, which makes it ideal for cold worked, stress relieved seamless tube.
Aircraft hydraulic systems use it to replace stainless tubing at roughly half the weight, and it also appears in bicycle frames, golf shafts and other high performance tubular structures.
We stock 3-2.5 as seamless tube and bar, in annealed and cold worked stress relieved condition.
Sizes and stock
- Tubing: various sizes
- Round bar: various sizes
Processing capabilities
- Billet conversion into custom bar, plate, ring and shaped product
- Open die, closed die, ring and near-net forging
- Anneal, solution treat and age, plus stress relief
- Ultrasonic, penetrant dye and chemical assay verification
Specifications
Material is released to the applicable specification with mill test reports and, on request, independent lab verification.
Why engineers specify Ti 3Al-2.5V
- Optimized for seamless tube and cold forming
- Large weight saving over stainless hydraulic lines
- Weldable with good fatigue performance
- Cold worked stress relieved condition available
Nominal chemistry
Percent by weight, nominal composition per the governing specification. The mill test report for your heat is the controlling document.
Typical mechanical properties
| Condition | Tensile strength | Yield strength | Elongation | Hardness |
|---|---|---|---|---|
| Annealed | 90 ksi min | 70 ksi min | 15% min | - |
| Cold worked stress relieved | 125 ksi min | 105 ksi min | 10% min | - |
Typical published values for reference only, not for design. Properties vary with section size, product form and processing. Order to the specification and condition your drawing requires.
Typical applications
- Aircraft hydraulic tubing
- Fuel and pneumatic lines
- Bicycle and sporting frames
- Lightweight tubular structure
Fabrication notes
Machining
Titanium runs at low surface speed with heavy positive feed, sharp tooling, rigid fixturing and high volume coolant. Dwelling glazes the surface and work hardens it. Chips are combustible, so manage swarf. We can supply rough machined, saw cut, waterjet or near net blanks to cut down the metal removed.
Welding
Readily weldable by GTAW, plasma, electron beam and laser processes with full inert gas shielding of the pool, root and cooling weld. Contamination shows up as colour on the bead and as embrittlement, so shielding and cleanliness govern the result.
Forming
Cold formability is limited compared with steel, so hot forming, generous bend radii and stress relief after forming are normal practice. Surfaces must be clean of iron pickup before heat treatment.
Ti 3Al-2.5V compared with similar grades
Ti 6Al-4V
Higher strength, much less formable in tube.
CP Grade 2
Far more formable at roughly half the strength.
Designations and cross reference
- Material family
- Titanium & Titanium Alloys
- UNS number
- R56320
- Werkstoff (W.Nr)
- 3.7194
- EN designation
- TiAl3V2.5
Working from an obsolete, foreign or superseded designation? Send it over and we will cross reference it to a current grade and specification.
Quality, testing and traceability
Supplied with mill test reports, melt traceability, and ultrasonic inspection, penetrant dye, chemical assay, microstructure and mechanical testing available on request.
We are AS9100D and ISO 9001:2015 registered. If our stock does not already carry the inspection your specification requires, we can quote the material with that work performed. More on our quality system
Available forms
Custom sizes converted from billet, plus saw cut, waterjet and near-net blanks. See custom conversions
Ti 3Al-2.5V frequently asked questions
What is Ti 3Al-2.5V?
Ti 3Al-2.5V is the hydraulic tubing alloy. It is significantly more formable and weldable than Ti 6Al-4V while carrying about twice the strength of commercially pure titanium, which makes it ideal for cold worked, stress relieved seamless tube.
What forms is Ti 3Al-2.5V available in?
We supply Ti 3Al-2.5V in tube, bar. Custom sizes are converted from billet, and we can provide saw cut, waterjet or near net blanks so material arrives closer to your finished part.
What is the UNS or equivalent designation for Ti 3Al-2.5V?
Ti 3Al-2.5V is designated UNS R56320, Werkstoff 3.7194, EN TiAl3V2.5. If your drawing calls out an obsolete or foreign designation we can cross reference it and confirm the equivalent before you order.
What specifications can Ti 3Al-2.5V be supplied to?
Commonly ordered specifications include AMS 4943, AMS 4944, UNS R56320. Material is released to the specification and condition on your purchase order, with mill test reports supplied as standard.
What conditions can Ti 3Al-2.5V be ordered in?
We can supply Annealed, Cold worked stress relieved. If our stock is not already in the condition you need, we can quote it with the heat treatment performed before shipment.
Can you cut Ti 3Al-2.5V to size?
Yes. Saw cutting, waterjet, laser and shearing are available, along with trepanning, gun drilling, lathe turning and CNC machining, so you can order blanks or rough machined pieces rather than full lengths.
Do you provide test reports and additional testing on Ti 3Al-2.5V?
Every order ships with mill test reports and heat traceability. If your print calls for ultrasonic inspection, penetrant dye, magnetic particle, chemical assay, micrography, hardness or mechanical testing and our stock does not already carry it, we can quote the material with that work performed.
Can Ti 3Al-2.5V be supplied to DFARS domestic melt requirements?
Tell us at quote stage if the order is DFARS or domestic melt restricted and we will confirm availability against that requirement before you commit.
What do you need to quote Ti 3Al-2.5V?
Grade, form, dimensions, quantity, specification and condition, plus any testing or certification requirements and the date you need it. Send a drawing if you have one. Quotes are typically ready within 24 hours.
How does Ti 3Al-2.5V compare with Ti 6Al-4V?
Higher strength, much less formable in tube.