Ti 6Al-2Sn-4Zr-6Mo is a high strength alpha beta titanium alloy. The higher molybdenum content gives it deeper hardenability than 6-2-4-2, so heavy sections respond fully to solution treatment and aging, and strength sits well above Ti 6Al-4V.
It is used where strength in a thick titanium section matters more than maximum temperature capability, including engine components and heavy airframe forgings.
Stocked as bar, billet and forgings in the solution treated and aged condition.
Sizes and stock
- Round bar: up to 6" DIA
- Flat bar and forgings: available by request
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 6-2-4-6
- Higher strength than Ti 6Al-4V
- Deep hardenability for heavy sections
- Good elevated temperature capability to around 750F
- Suits forged and machined structural hardware
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 |
|---|---|---|---|---|
| Solution treated and aged | 170 ksi min | 160 ksi min | 8% 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
- Engine compressor components
- Heavy airframe forgings
- High strength structural hardware
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 6-2-4-6 compared with similar grades
Ti 6-2-4-2
Better creep resistance and higher temperature capability, lower strength.
Ti 10-2-3
Beta alloy with higher forged strength for landing gear structure.
Designations and cross reference
- Material family
- Titanium & Titanium Alloys
- UNS number
- R56260
- Werkstoff (W.Nr)
- 3.7164
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 6-2-4-6 frequently asked questions
What is Ti 6-2-4-6?
Ti 6Al-2Sn-4Zr-6Mo is a high strength alpha beta titanium alloy. The higher molybdenum content gives it deeper hardenability than 6-2-4-2, so heavy sections respond fully to solution treatment and aging, and strength sits well above Ti 6Al-4V.
What forms is Ti 6-2-4-6 available in?
We supply Ti 6-2-4-6 in bar, forging. 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 6-2-4-6?
Ti 6-2-4-6 is designated UNS R56260, Werkstoff 3.7164. 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 6-2-4-6 be supplied to?
Commonly ordered specifications include AMS 4981, MIL-T-9047, UNS R56260. Material is released to the specification and condition on your purchase order, with mill test reports supplied as standard.
What conditions can Ti 6-2-4-6 be ordered in?
We can supply Solution treated and aged. 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 6-2-4-6 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 6-2-4-6?
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 6-2-4-6 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 6-2-4-6?
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 6-2-4-6 compare with Ti 6-2-4-2?
Better creep resistance and higher temperature capability, lower strength.