Titanium Ti-6-22-22
UNS R56223
Ti-6-22-22 (UNS R56223) is a damage-tolerant, high-strength alpha-beta titanium alloy developed for airframe structure that must combine strength with fracture toughness and fatigue resistance.
Reference datasheet — Ti-6-22-22 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-6-22-22 tempers and conditions
Ti-6-22-22 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 condition supplied when the part is to be formed or straightened before final ageing. | 900 | 1,000 | 14 | 32 HRC | 1 % IACS |
Recrystallization annealed | Damage-tolerant plate condition: equiaxed structure with good toughness and stable fatigue-crack-growth behaviour. | 910 | 1,000 | 12 | 33 HRC | 1 % IACS |
mill/duplex annealed (alpha-beta anneal) | Softest supply condition for machining stock and subsequent hot forming; strength well below the aged capability. | 950 | 1,035 | 13 | 33 HRC | — |
Beta solution treated and overaged | Compromise heat treatment giving near-STA strength with markedly better toughness; used for heavy airframe forgings. | 1,035 | 1,140 | 9 | 36 HRC | 1 % IACS |
STADefault Solution treated and aged | Standard high-strength condition for airframe forgings, plate and machined fittings; best strength-to-toughness balance. | 1,160 | 1,240 | 10 | 38 HRC | — |
Supply forms, finishes and certifications
Ways Ti-6-22-22 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-6-22-22?
Ti-6-22-22 (UNS R56223) is a damage-tolerant, high-strength alpha-beta titanium alloy developed for airframe structure that must combine strength with fracture toughness and fatigue resistance. It is used for forged and machined structural parts and high-strength fasteners, reaching 1160 MPa yield, 1240 MPa tensile, 10% elongation and 38 HRC, with service to 315 °C; conditions on file are annealed, ST, STA, BA, BSTOA and RA. Machinability (16) and formability (18) are both low, and as-welded ductility requires post-weld heat treatment. Ti-6Al-6V-2Sn is the nearest alternative for heavy forgings. Ti-6-22-22 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-6-22-22 has a yield strength of 1,160 MPa (168 ksi) and a tensile strength of 1,240 MPa (180 ksi) — stronger than 99% of titanium grades. Elongation at break is 10% and the elastic modulus is 117 GPa (17 Msi).
What is Ti-6-22-22 used for?
- Airframe structural components
- High-strength fasteners
- Wing and fuselage forgings
- Bulkhead and frame fittings
- Landing gear structure
- Machined structural brackets
Advantages
- High strength — 1,160 MPa (168 ksi), better than 99% of titanium grades
Limitations
- Hard to polish — 60/100, worse than 97% of titanium grades
- Limited ductility — 10%, worse than 93% of titanium grades
- Difficult to weld — 45/100, worse than 92% of titanium grades
- Low fracture toughness — 55 MPa·√m (50.1 ksi·√in), worse than 90% of titanium grades
- Low electrical conductivity — 1 % IACS, worse than 89% of titanium grades
Ti-6-22-22 properties
Typical room-temperature values for Ti-6-22-22-STA; bars are the position among titanium grades.
Physical3
Ti-6-22-22 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).
Mechanical15
Ti-6-22-22 has a yield strength of 1,160 MPa (168 ksi) and a tensile strength of 1,240 MPa (180 ksi) — stronger than 99% of titanium grades. Elongation at break is 10% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
Ti-6-22-22 is rated for continuous service to 315°C (599 °F). It conducts heat at 7 W/m·K (4.04 BTU/hr·ft·°F), worse than 76% of titanium grades. Thermal expansion is 9 µm/m·K (5 µin/in·°F).
Electrical3
Ti-6-22-22 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-6-22-22 takes about 650 MJ of energy and emits 42 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability7
Ti-6-22-22's machinability is poor (16/100, worse than 93% of titanium grades); weldability fair (45/100); formability poor (18/100).
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-6-22-22 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti-6-22-22
Is Ti-6-22-22 easy to machine?
Treat as harder-than-Ti-6Al-4V: rigid setups, low surface speed (~20–35 m/min carbide), heavy positive feed, flood coolant, and no dwell to avoid work hardening and edge chipping.
Can Ti-6-22-22 be welded?
GTAW/plasma/EB or laser with full inert shielding of hot zone; keep interstitials low, use matching or Ti-6Al-4V-class filler, and post-weld stress relieve/age since as-welded ductility is low.
Can Ti-6-22-22 be formed, bent or molded?
Hot form or hot size at 700–900 °C; cold forming in STA is impractical, generous bend radii and springback allowance are required even in the annealed condition.
Ti-6-22-22 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 |
|---|---|---|
| Al | 5.5 – 6.5 | 6 |
| Sn | 1.5 – 2.5 | 2 |
| Zr | 1.5 – 2.5 | 2 |
| Mo | 1.5 – 2.5 | 2 |
| Cr | 1.5 – 2.5 | 2 |
| Sithe '-22-22S' variant; some early heats made Si-free | 0.1 – 0.25 | 0.2 |
| Fe | ≤ 0.25 | |
| O | ≤ 0.14 | |
| C | ≤ 0.05 | |
| N | ≤ 0.04 | |
| Hmax, product-form dependent | ≤ 0.01 | |
| Ti | balance |
What surface finishes work on Ti-6-22-22?
Grit blast/pickle to remove alpha case after hot work; Ti anodize or fluoride-phosphate conversion for anti-galling, dry-film lube or IVD Al where fretting/fastener contact occurs.
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-6-22-22 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R56223
How much does Ti-6-22-22 cost?
Ti-6-22-22 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-6-22-22 — frequently asked
What is Ti-6-22-22 used for?
Ti-6-22-22 is typically used for airframe structural components, high-strength fasteners, wing and fuselage forgings, bulkhead and frame fittings, landing gear structure and machined structural brackets. In short: damage-tolerant airframe alloy; higher strength than Ti-6Al-4V; hot forming required.
What is the yield strength of Ti-6-22-22?
Ti-6-22-22 has a typical yield strength of 1,160 MPa (168 ksi) and a tensile strength of 1,240 MPa (180 ksi) — stronger than 99% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Ti-6-22-22 easy to machine?
Not especially — machinability is rated poor (16/100, worse than 93% of titanium grades). Treat as harder-than-Ti-6Al-4V: rigid setups, low surface speed (~20–35 m/min carbide), heavy positive feed, flood coolant, and no dwell to avoid work hardening and edge chipping.
Can Ti-6-22-22 be welded?
With care — weldability is rated fair (45/100). GTAW/plasma/EB or laser with full inert shielding of hot zone; keep interstitials low, use matching or Ti-6Al-4V-class filler, and post-weld stress relieve/age since as-welded ductility is low.
What surface finishes work on Ti-6-22-22?
Grit blast/pickle to remove alpha case after hot work; Ti anodize or fluoride-phosphate conversion for anti-galling, dry-film lube or IVD Al where fretting/fastener contact occurs.
Can Ti-6-22-22 be formed, bent or molded?
Hot form or hot size at 700–900 °C; cold forming in STA is impractical, generous bend radii and springback allowance are required even in the annealed condition.
What is the maximum service temperature of Ti-6-22-22?
Ti-6-22-22 is rated for continuous use to about 315°C (599 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti-6-22-22-STA and Ti-6-22-22-ST?
STA is the default condition — standard high-strength condition for airframe forgings, plate and machined fittings; best strength-to-toughness balance. ST: intermediate condition supplied when the part is to be formed or straightened before final ageing. Yield strength is 1,160 MPa in STA versus 900 MPa in ST.
How much does Ti-6-22-22 cost?
Ti-6-22-22 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)
- ASM Handbook Vol. 13B — Corrosion: Materials (titanium chapter) — ASM International (2005)
- MMPDS — Metallic Materials Properties Development and Standardization (titanium alloy typical data conventions) — Battelle/FAA (2023)
- AMS 2488 — Anodic Treatment of Titanium and Titanium Alloys — SAE International (2019)
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.