Titanium Ti-6Al-2Nb-1Ta-0.8Mo
Ti-6Al-2Nb-1Ta-0.8Mo (Ti-6211 class) is a near-alpha titanium alloy with niobium, tantalum and molybdenum additions that favour fracture toughness and thick-section weldability, aimed at cryogenic and hydrogen-compatible hardware.
Reference datasheet — Ti-6Al-2Nb-1Ta-0.8Mo 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 Annealed condition
Ti-6Al-2Nb-1Ta-0.8Mo tempers and conditions
Ti-6Al-2Nb-1Ta-0.8Mo is supplied in 3 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-welded deposit | Property basis for weldments in thick-section fabrications; joints normally overmatch base-metal ductility requirements. | 765 | 855 | 10 | 31 HRC | 1.1 % IACS |
AnnealedDefault mill (alpha-beta) annealed plate/bar | General stocking condition: balanced strength, ductility and weldability for plate and bar. | 780 | 860 | 15 | 30 HRC | — |
Solution treated and aged | Choose when higher strength is needed in thin sections and toughness can be traded down. | 865 | 950 | 11 | 33 HRC | — |
Supply forms, finishes and certifications
Ways Ti-6Al-2Nb-1Ta-0.8Mo 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-6Al-2Nb-1Ta-0.8Mo?
Ti-6Al-2Nb-1Ta-0.8Mo (Ti-6211 class) is a near-alpha titanium alloy with niobium, tantalum and molybdenum additions that favour fracture toughness and thick-section weldability, aimed at cryogenic and hydrogen-compatible hardware. Default properties are 780 MPa yield, 860 MPa tensile, 15% elongation and about 30 HRC, with service to 400 °C; forms include plate, heavy weldable plate, forgings and bar in annealed, BA, STA and as-welded conditions. Weldability is high (80), but formability (35) and machinability (18) are limited. Ti-6Al-4V gives higher strength where toughness and weld quality matter less. Ti-6Al-2Nb-1Ta-0.8Mo has a density of 4.48 g/cm³ (0.162 lb/in³), lighter than 71% of titanium grades. It melts at 1,620°C (2,948 °F). Ti-6Al-2Nb-1Ta-0.8Mo has a yield strength of 780 MPa (113 ksi) and a tensile strength of 860 MPa (125 ksi) — stronger than 54% of titanium grades. Elongation at break is 15% and the elastic modulus is 114 GPa (16.5 Msi).
What is Ti-6Al-2Nb-1Ta-0.8Mo used for?
- cryogenic tankage
- hydrogen storage vessels
- aerospace structures
Advantages
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Ti-6Al-2Nb-1Ta-0.8Mo properties
Typical room-temperature values for Ti-6Al-2Nb-1Ta-0.8Mo-Annealed; bars are the position among titanium grades.
Physical3
Ti-6Al-2Nb-1Ta-0.8Mo has a density of 4.48 g/cm³ (0.162 lb/in³), lighter than 71% of titanium grades. It melts at 1,620°C (2,948 °F).
Mechanical16
Ti-6Al-2Nb-1Ta-0.8Mo has a yield strength of 780 MPa (113 ksi) and a tensile strength of 860 MPa (125 ksi) — stronger than 54% of titanium grades. Elongation at break is 15% and the elastic modulus is 114 GPa (16.5 Msi).
Thermal6
Ti-6Al-2Nb-1Ta-0.8Mo is rated for continuous service to 400°C (752 °F). It conducts heat at 7 W/m·K (4.04 BTU/hr·ft·°F), worse than 76% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Ti-6Al-2Nb-1Ta-0.8Mo conducts electricity at 1.1 % IACS, worse than 67% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (95/100), better than 83% of titanium grades.
Sustainability4
Producing a kilogram of Ti-6Al-2Nb-1Ta-0.8Mo takes about 650 MJ of energy and emits 42 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti-6Al-2Nb-1Ta-0.8Mo's machinability is poor (18/100, worse than 83% of titanium grades); weldability very good (80/100); formability fair (35/100).
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-2Nb-1Ta-0.8Mo is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti-6Al-2Nb-1Ta-0.8Mo
Is Ti-6Al-2Nb-1Ta-0.8Mo easy to machine?
Machine like Ti-6Al-4V but slightly softer: rigid setups, sharp uncoated carbide, 25–45 m/min, heavy flood coolant and positive feed to avoid work-hardening and galling.
Can Ti-6Al-2Nb-1Ta-0.8Mo be welded?
Excellent GTAW/GMAW/EB weldability in thick sections with matching or Ti-6211 low-oxygen filler; full inert-gas trailing/backing shielding and interpass cleanliness are mandatory, hydrogen must be kept low.
Can Ti-6Al-2Nb-1Ta-0.8Mo be formed, bent or molded?
Cold formability is limited (bend radii ≥4–5t); hot form at 700–850 °C and beta anneal afterwards for best toughness; avoid iron pickup from tooling.
Ti-6Al-2Nb-1Ta-0.8Mo 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 stabiliser | 5.5 – 6.5 | 6 |
| Nb | 1.5 – 2.5 | 2 |
| Ta | 0.6 – 1.4 | 1 |
| Mobeta stabiliser | 0.5 – 1 | 0.8 |
| Fe | ≤ 0.25 | |
| Okept low for cryogenic toughness | ≤ 0.12 | 0.09 |
| C | ≤ 0.05 | |
| N | ≤ 0.03 | |
| H | ≤ 0.01 | |
| Ti | balance |
What surface finishes work on Ti-6Al-2Nb-1Ta-0.8Mo?
Chemically mill/pickle in HNO3-HF to remove alpha case after hot work; anodize (AMS 2488 type) or passivate for service; polishes well but avoid chlorinated residues before heat treatment.
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-2Nb-1Ta-0.8Mo in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- Ti-6211
How much does Ti-6Al-2Nb-1Ta-0.8Mo cost?
Ti-6Al-2Nb-1Ta-0.8Mo 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-2Nb-1Ta-0.8Mo — frequently asked
What is Ti-6Al-2Nb-1Ta-0.8Mo used for?
Ti-6Al-2Nb-1Ta-0.8Mo is typically used for cryogenic tankage, hydrogen storage vessels and aerospace structures. In short: most weldable near-alpha titanium; tough at cryogenic temperature; hydrogen-compatible structural grade.
What is the yield strength of Ti-6Al-2Nb-1Ta-0.8Mo?
Ti-6Al-2Nb-1Ta-0.8Mo has a typical yield strength of 780 MPa (113 ksi) and a tensile strength of 860 MPa (125 ksi) — stronger than 54% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is Ti-6Al-2Nb-1Ta-0.8Mo easy to machine?
Not especially — machinability is rated poor (18/100, worse than 83% of titanium grades). Machine like Ti-6Al-4V but slightly softer: rigid setups, sharp uncoated carbide, 25–45 m/min, heavy flood coolant and positive feed to avoid work-hardening and galling.
Can Ti-6Al-2Nb-1Ta-0.8Mo be welded?
Yes — weldability is rated very good (80/100). Excellent GTAW/GMAW/EB weldability in thick sections with matching or Ti-6211 low-oxygen filler; full inert-gas trailing/backing shielding and interpass cleanliness are mandatory, hydrogen must be kept low.
What surface finishes work on Ti-6Al-2Nb-1Ta-0.8Mo?
Chemically mill/pickle in HNO3-HF to remove alpha case after hot work; anodize (AMS 2488 type) or passivate for service; polishes well but avoid chlorinated residues before heat treatment.
Can Ti-6Al-2Nb-1Ta-0.8Mo be formed, bent or molded?
Cold formability is limited (bend radii ≥4–5t); hot form at 700–850 °C and beta anneal afterwards for best toughness; avoid iron pickup from tooling.
What is the maximum service temperature of Ti-6Al-2Nb-1Ta-0.8Mo?
Ti-6Al-2Nb-1Ta-0.8Mo 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-2Nb-1Ta-0.8Mo Annealed and Ti-6Al-2Nb-1Ta-0.8Mo-STA?
Annealed is the default condition — general stocking condition: balanced strength, ductility and weldability for plate and bar. STA: choose when higher strength is needed in thin sections and toughness can be traded down. Yield strength is 780 MPa in Annealed versus 865 MPa in STA.
How much does Ti-6Al-2Nb-1Ta-0.8Mo cost?
Ti-6Al-2Nb-1Ta-0.8Mo 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 — ASM International (2005)
- AMS 2488 — Anodic Treatment of Titanium and Titanium Alloys — SAE International (2019)
- US Naval Research Laboratory reports on Ti-6Al-2Nb-1Ta-0.8Mo plate and weldments — NRL (1985)
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.