Titanium Ti-6Al-2Sn-4Zr-6Mo
UNS R56260
Ti-6Al-2Sn-4Zr-6Mo (UNS R56260) is a heavily beta-stabilized alpha-beta titanium alloy developed for high strength combined with elevated-temperature capability.
Reference datasheet — Ti-6Al-2Sn-4Zr-6Mo is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the STA condition
Ti-6Al-2Sn-4Zr-6Mo tempers and conditions
Ti-6Al-2Sn-4Zr-6Mo is supplied in 5 conditions, soft to hard. STA is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Intermediate softer condition used for machining or hot working before the final aging cycle. | 900 | 970 | 15 | 32 HRC | 0.9 % IACS |
mill/duplex annealed | Lower-strength, more ductile and dimensionally stable condition for stock that will be re-heat-treated or for less critical parts. | 950 | 1,030 | 13 | 34 HRC | — |
Beta-STA | Pick when fracture toughness, creep and crack-growth resistance matter more than tensile ductility (heavier disks and thick forgings). | 1,010 | 1,100 | 8 | 37 HRC | 1 % IACS |
Solution treated and overaged | Overaged cycle trading ~5–10 % tensile strength for better thermal stability, toughness and creep life in long-duty engine hardware. | 1,020 | 1,100 | 12 | 36 HRC | 1 % IACS |
STADefault Solution treated and aged | Standard supply condition for bar, billet and forgings: highest strength for compressor disks, blades and high-load fittings up to ~400 °C. | 1,100 | 1,170 | 10 | 38 HRC | — |
What is Ti-6Al-2Sn-4Zr-6Mo?
Ti-6Al-2Sn-4Zr-6Mo (UNS R56260) is a heavily beta-stabilized alpha-beta titanium alloy developed for high strength combined with elevated-temperature capability. It is used for jet-engine compressor hardware and high-strength forgings, reaching 1100 MPa yield, 1170 MPa tensile, 10% elongation and 350 HB / 38 HRC in STA, with service to 400 °C; conditions on file include STA, ST, annealed, BSTA and STOA. The penalties are the lowest machinability in the family (score 14), formability of 10 that rules out cold work, and welded joints that need full re-heat treatment. Ti-6Al-2Sn-4Zr-2Mo is the alternative when creep life outranks room-temperature strength. Ti-6Al-2Sn-4Zr-6Mo has a density of 4.65 g/cm³ (0.168 lb/in³), heavier than 90% of titanium grades. It melts at 1,590°C (2,894 °F). Ti-6Al-2Sn-4Zr-6Mo has a yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,170 MPa (170 ksi) — stronger than 98% of titanium grades. Elongation at break is 10% and the elastic modulus is 114 GPa (16.5 Msi).
What is Ti-6Al-2Sn-4Zr-6Mo used for?
- turbine compressor disks
- compressor blades
- high-strength airframe forgings
Advantages
- High strength — 1,100 MPa (160 ksi), better than 98% of titanium grades
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Limitations
- Low fracture toughness — 32 MPa·√m (29.1 ksi·√in), worse than 100% of titanium grades
- Difficult to machine — 14/100, worse than 100% of titanium grades
- Limited formability — 10/100, worse than 99% of titanium grades
- Difficult to weld — 30/100, worse than 98% of titanium grades
- Poor heat conductor — 6.6 W/m·K (3.81 BTU/hr·ft·°F), worse than 97% of titanium grades
Ti-6Al-2Sn-4Zr-6Mo properties
Typical room-temperature values for Ti-6Al-2Sn-4Zr-6Mo-STA; bars are the position among titanium grades.
Physical3
Ti-6Al-2Sn-4Zr-6Mo has a density of 4.65 g/cm³ (0.168 lb/in³), heavier than 90% of titanium grades. It melts at 1,590°C (2,894 °F).
Mechanical16
Ti-6Al-2Sn-4Zr-6Mo has a yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,170 MPa (170 ksi) — stronger than 98% of titanium grades. Elongation at break is 10% and the elastic modulus is 114 GPa (16.5 Msi).
Thermal6
Ti-6Al-2Sn-4Zr-6Mo is rated for continuous service to 400°C (752 °F). It conducts heat at 6.6 W/m·K (3.81 BTU/hr·ft·°F), worse than 97% of titanium grades. Thermal expansion is 8 µm/m·K (4.44 µin/in·°F).
Electrical3
Ti-6Al-2Sn-4Zr-6Mo conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), worse than 77% of titanium grades.
Sustainability4
Producing a kilogram of Ti-6Al-2Sn-4Zr-6Mo takes about 700 MJ of energy and emits 42 kg of CO₂ — more than 74% of titanium grades. Typical recycled content is 25%.
Manufacturability7
Ti-6Al-2Sn-4Zr-6Mo's machinability is not recommended (14/100, worse than 100% of titanium grades); weldability poor (30/100); formability not recommended (10/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the titanium family
Yield strength against density for every titanium grade FabDigit runs. Ti-6Al-2Sn-4Zr-6Mo is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti-6Al-2Sn-4Zr-6Mo
Is Ti-6Al-2Sn-4Zr-6Mo easy to machine?
Machine rigid with sharp uncoated-carbide or coated carbide tools, low speed (~15–25 m/min in STA), heavy positive rake, generous high-pressure flood coolant; never dwell — work hardening and fire risk from fine chips.
Can Ti-6Al-2Sn-4Zr-6Mo be welded?
GTAW/EBW/LBW possible under high-purity inert gas or vacuum, but the aged microstructure is destroyed locally — full post-weld solution + age is needed and welded joints are avoided in rotating parts.
Can Ti-6Al-2Sn-4Zr-6Mo be formed, bent or molded?
Essentially a hot-working alloy: forge/roll just below the ~940 °C beta transus with controlled strain rate; cold forming is limited to gentle bends with large radii in the solution-treated state.
Ti-6Al-2Sn-4Zr-6Mo chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Alalpha stabilizer | 5.5 – 6.5 | 6 |
| Sn | 1.75 – 2.25 | 2 |
| Zr | 3.5 – 4.5 | 4 |
| Mobeta stabilizer, gives high hardenability | 5.5 – 6.5 | 6 |
| Fe | ≤ 0.15 | 0.05 |
| O | ≤ 0.15 | 0.11 |
| C | ≤ 0.04 | 0.02 |
| N | ≤ 0.04 | 0.01 |
| H0.015 max for some product forms | ≤ 0.01 | 0.01 |
| Yrotor-grade limit | ≤ 0.01 | |
| Other, eachresiduals total 0.40 max | ≤ 0.1 | |
| Ti | balance |
What surface finishes work on Ti-6Al-2Sn-4Zr-6Mo?
Chemically mill or pickle in HNO3/HF to strip alpha case after hot work; shot peen for fatigue life; decorative/anti-fret anodize or ion nitriding are the usual surface treatments — avoid cadmium and silver plating (embrittlement).
Surface treatments FabDigit runs on titanium parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium Ti-6Al-2Sn-4Zr-6Mo in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R56260
- Also called
- Ti-6-2-4-6
- Other
- 4981
How much does Ti-6Al-2Sn-4Zr-6Mo cost?
Ti-6Al-2Sn-4Zr-6Mo is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Ti-6Al-2Sn-4Zr-6Mo — frequently asked
What is Ti-6Al-2Sn-4Zr-6Mo used for?
Ti-6Al-2Sn-4Zr-6Mo is typically used for turbine compressor disks, compressor blades and high-strength airframe forgings. In short: strongest alpha-beta forging alloy; 400 °C service capability; hardest to machine of family.
What is the yield strength of Ti-6Al-2Sn-4Zr-6Mo?
Ti-6Al-2Sn-4Zr-6Mo has a typical yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,170 MPa (170 ksi) — stronger than 98% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Ti-6Al-2Sn-4Zr-6Mo easy to machine?
Not especially — machinability is rated not recommended (14/100, worse than 100% of titanium grades). Machine rigid with sharp uncoated-carbide or coated carbide tools, low speed (~15–25 m/min in STA), heavy positive rake, generous high-pressure flood coolant; never dwell — work hardening and fire risk from fine chips.
Can Ti-6Al-2Sn-4Zr-6Mo be welded?
Not readily — weldability is rated poor (30/100). GTAW/EBW/LBW possible under high-purity inert gas or vacuum, but the aged microstructure is destroyed locally — full post-weld solution + age is needed and welded joints are avoided in rotating parts.
What surface finishes work on Ti-6Al-2Sn-4Zr-6Mo?
Chemically mill or pickle in HNO3/HF to strip alpha case after hot work; shot peen for fatigue life; decorative/anti-fret anodize or ion nitriding are the usual surface treatments — avoid cadmium and silver plating (embrittlement).
Can Ti-6Al-2Sn-4Zr-6Mo be formed, bent or molded?
Essentially a hot-working alloy: forge/roll just below the ~940 °C beta transus with controlled strain rate; cold forming is limited to gentle bends with large radii in the solution-treated state.
What is the maximum service temperature of Ti-6Al-2Sn-4Zr-6Mo?
Ti-6Al-2Sn-4Zr-6Mo is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti-6Al-2Sn-4Zr-6Mo-STA and Ti-6Al-2Sn-4Zr-6Mo-ST?
STA is the default condition — standard supply condition for bar, billet and forgings: highest strength for compressor disks, blades and high-load fittings up to ~400 °C. ST: intermediate softer condition used for machining or hot working before the final aging cycle. Yield strength is 1,100 MPa in STA versus 900 MPa in ST.
How much does Ti-6Al-2Sn-4Zr-6Mo cost?
Ti-6Al-2Sn-4Zr-6Mo is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- AMS 4981 — Titanium Alloy Bars, Forgings and Rings 6Al-2Sn-4Zr-6Mo, Solution and Precipitation Heat Treated — SAE International (2018)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASTM B348 / UNS R56260 designation data — ASTM International (2021)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.