Titanium Ti-5Al-5Sn-2Zr-2Mo
Ti-5Al-5Sn-2Zr-2Mo is a near-alpha titanium alloy developed for airframe and rocket motor case hardware that needs strength-to-weight together with creep resistance to 480 °C.
Reference datasheet — Ti-5Al-5Sn-2Zr-2Mo 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 DA condition
Ti-5Al-5Sn-2Zr-2Mo tempers and conditions
Ti-5Al-5Sn-2Zr-2Mo is supplied in 5 conditions, soft to hard. DA 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 |
|---|---|---|---|---|---|---|
Mill Annealed | Lowest-cost as-supplied condition for bar and plate that will be re-heat-treated or lightly loaded. | 910 | 1,000 | 13 | 32 HRC | — |
Stress relieved | Forging/weldment supply condition to remove residual stress before final machining and heat treatment. | 930 | 1,020 | 11 | 33 HRC | 1.1 % IACS |
DADefault Duplex Annealed | The standard airframe/rocket-case condition: balanced strength, ductility and thermal stability to ~480 °C. | 950 | 1,035 | 12 | 34 HRC | — |
Beta STA | Beta-processed route with an ageing step: creep and toughness of BA with a modest strength recovery. | 960 | 1,060 | 7 | 35 HRC | 1.1 % IACS |
Solution treated and aged | Pick when maximum room-temperature strength is required in thinner sections; ductility and toughness drop. | 1,050 | 1,150 | 9 | 37 HRC | — |
Supply forms, finishes and certifications
Ways Ti-5Al-5Sn-2Zr-2Mo is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
BA | Beta Annealed | Surface finish |
What is Ti-5Al-5Sn-2Zr-2Mo?
Ti-5Al-5Sn-2Zr-2Mo is a near-alpha titanium alloy developed for airframe and rocket motor case hardware that needs strength-to-weight together with creep resistance to 480 °C. In the default condition it holds 950 MPa yield, 1035 MPa tensile, 12% elongation and about 34 HRC, and is supplied as forgings, bar, plate and rolled rings in MA, DA, STA, BA, BSTA and SR conditions. Weldability is moderate (score 55) and machinability is low (18), so tooling cost and cycle time run above Ti-6Al-4V. Where 480 °C service is not required, Ti-6Al-4V is the cheaper and more available substitute. Ti-5Al-5Sn-2Zr-2Mo has a density of 4.55 g/cm³ (0.164 lb/in³), heavier than 84% of titanium grades. It melts at 1,600°C (2,912 °F). Ti-5Al-5Sn-2Zr-2Mo has a yield strength of 950 MPa (138 ksi) and a tensile strength of 1,035 MPa (150 ksi) — stronger than 88% of titanium grades. Elongation at break is 12% and the elastic modulus is 117 GPa (17 Msi).
What is Ti-5Al-5Sn-2Zr-2Mo used for?
- airframe structures
- rocket motor cases
- high-temperature fasteners
Advantages
- High service temperature — 480°C (896 °F), better than 90% of titanium grades
- High strength — 950 MPa (138 ksi), better than 88% of titanium grades
Limitations
- Hard to polish — 60/100, worse than 97% of titanium grades
- Low fracture toughness — 50 MPa·√m (45.5 ksi·√in), worse than 96% of titanium grades
- Difficult to weld — 55/100, worse than 87% of titanium grades
- Limited ductility — 12%, worse than 78% of titanium grades
- Limited formability — 22/100, worse than 78% of titanium grades
Ti-5Al-5Sn-2Zr-2Mo properties
Typical room-temperature values for Ti-5Al-5Sn-2Zr-2Mo-DA; bars are the position among titanium grades.
Physical3
Ti-5Al-5Sn-2Zr-2Mo has a density of 4.55 g/cm³ (0.164 lb/in³), heavier than 84% of titanium grades. It melts at 1,600°C (2,912 °F).
Mechanical16
Ti-5Al-5Sn-2Zr-2Mo has a yield strength of 950 MPa (138 ksi) and a tensile strength of 1,035 MPa (150 ksi) — stronger than 88% of titanium grades. Elongation at break is 12% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
Ti-5Al-5Sn-2Zr-2Mo is rated for continuous service to 480°C (896 °F). It conducts heat at 7.5 W/m·K (4.33 BTU/hr·ft·°F), worse than 65% of titanium grades. Thermal expansion is 9 µm/m·K (5 µin/in·°F).
Electrical3
Ti-5Al-5Sn-2Zr-2Mo conducts electricity at 1.1 % IACS, worse than 67% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), worse than 77% of titanium grades.
Sustainability4
Producing a kilogram of Ti-5Al-5Sn-2Zr-2Mo takes about 700 MJ of energy and emits 42 kg of CO₂ — more than 74% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti-5Al-5Sn-2Zr-2Mo's machinability is poor (18/100, worse than 83% of titanium grades); weldability good (55/100); formability poor (22/100).
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-5Al-5Sn-2Zr-2Mo is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti-5Al-5Sn-2Zr-2Mo
Is Ti-5Al-5Sn-2Zr-2Mo easy to machine?
Machine like Ti-6Al-4V but slower: rigid setup, sharp uncoated carbide or PVD-coated tools, 20–40 m/min turning, heavy flood coolant, positive rake and no dwelling to avoid work hardening and fire risk from fine chips.
Can Ti-5Al-5Sn-2Zr-2Mo be welded?
GTAW, plasma or EBW in high-purity argon or vacuum with full back-purge; use matching filler, keep interstitials low, and stress-relieve/stabilize at 595–790 °C after welding to restore toughness.
Can Ti-5Al-5Sn-2Zr-2Mo be formed, bent or molded?
Cold formability is poor — bend and draw hot at 700–900 °C or use hot sizing/creep forming with generous bend radii (≥4–5 t) and post-form stress relief.
Ti-5Al-5Sn-2Zr-2Mo 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 |
|---|---|---|
| Alα stabilizer | 4.5 – 5.5 | 5 |
| Snneutral/α strengthener | 4.5 – 5.5 | 5 |
| Zr | 1.5 – 2.5 | 2 |
| Moβ stabilizer | 1.5 – 2.5 | 2 |
| Sipresent in the Ti-5522S creep-resistant version; omitted in the base Si-free composition | 0.15 – 0.35 | 0.25 |
| Fe | ≤ 0.15 | |
| Omax; kept low for thermal stability | ≤ 0.13 | 0.1 |
| C | ≤ 0.05 | |
| N | ≤ 0.04 | |
| H | ≤ 0.01 | |
| Ti | balance |
What surface finishes work on Ti-5Al-5Sn-2Zr-2Mo?
Chemical mill or pickle in HNO₃/HF to remove alpha case after hot work; blue-etch anodize for inspection, Type II anodize for colour, and plasma nitride, ion plating or dry-film lube for wear/galling surfaces.
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-5Al-5Sn-2Zr-2Mo in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- Ti-5522
How much does Ti-5Al-5Sn-2Zr-2Mo cost?
Ti-5Al-5Sn-2Zr-2Mo 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-5Al-5Sn-2Zr-2Mo — frequently asked
What is Ti-5Al-5Sn-2Zr-2Mo used for?
Ti-5Al-5Sn-2Zr-2Mo is typically used for airframe structures, rocket motor cases and high-temperature fasteners. In short: near-alpha for 480 °C service; creep-resistant airframe forging alloy; stronger than Ti-6Al-4V hot.
What is the yield strength of Ti-5Al-5Sn-2Zr-2Mo?
Ti-5Al-5Sn-2Zr-2Mo has a typical yield strength of 950 MPa (138 ksi) and a tensile strength of 1,035 MPa (150 ksi) — stronger than 88% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Ti-5Al-5Sn-2Zr-2Mo easy to machine?
Not especially — machinability is rated poor (18/100, worse than 83% of titanium grades). Machine like Ti-6Al-4V but slower: rigid setup, sharp uncoated carbide or PVD-coated tools, 20–40 m/min turning, heavy flood coolant, positive rake and no dwelling to avoid work hardening and fire risk from fine chips.
Can Ti-5Al-5Sn-2Zr-2Mo be welded?
Yes — weldability is rated good (55/100). GTAW, plasma or EBW in high-purity argon or vacuum with full back-purge; use matching filler, keep interstitials low, and stress-relieve/stabilize at 595–790 °C after welding to restore toughness.
What surface finishes work on Ti-5Al-5Sn-2Zr-2Mo?
Chemical mill or pickle in HNO₃/HF to remove alpha case after hot work; blue-etch anodize for inspection, Type II anodize for colour, and plasma nitride, ion plating or dry-film lube for wear/galling surfaces.
Can Ti-5Al-5Sn-2Zr-2Mo be formed, bent or molded?
Cold formability is poor — bend and draw hot at 700–900 °C or use hot sizing/creep forming with generous bend radii (≥4–5 t) and post-form stress relief.
What is the maximum service temperature of Ti-5Al-5Sn-2Zr-2Mo?
Ti-5Al-5Sn-2Zr-2Mo is rated for continuous use to about 480°C (896 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti-5Al-5Sn-2Zr-2Mo-DA and Ti-5Al-5Sn-2Zr-2Mo-STA?
DA is the default condition — the standard airframe/rocket-case condition: balanced strength, ductility and thermal stability to ~480 °C. STA: pick when maximum room-temperature strength is required in thinner sections; ductility and toughness drop. Yield strength is 950 MPa in DA versus 1,050 MPa in STA.
How much does Ti-5Al-5Sn-2Zr-2Mo cost?
Ti-5Al-5Sn-2Zr-2Mo 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
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Titanium: A Technical Guide, 2nd ed. — ASM International (2000)
- ASTM B348 / AMS specifications for titanium alloy bar and billet — ASTM / SAE (2021)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.