Titanium TA17
GB TA17
TA17 is a low-alloy near-alpha titanium supplied as sheet, plate and bar, strengthened by modest alloy additions rather than by heat treatment and stocked in annealed, stress-relieved and as-welded conditions.
Reference datasheet — TA17 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 M condition
TA17 tempers and conditions
TA17 is supplied in 5 conditions, soft to hard. M 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 |
|---|---|---|---|---|---|---|
MDefault Thermomechanically controlled processed | Standard stocked condition: best combination of ductility, weldability and dimensional stability for structural sheet and plate. | 620 | 730 | 16 | 235 HB | — |
As-welded deposit | Reference condition for design of welded marine structures: joint efficiency is high but joint ductility is below base metal until stress relieved. | 630 | 720 | 10 | 26 HRC | 1.1 % IACS |
Stress relieved | Use after welding, forming or rough machining to remove residual stress and restore weld-zone ductility without losing much strength. | 640 | 740 | 15 | 24 HRC | 1.1 % IACS |
As hot-rolled / hot-worked | Pick for heavy plate, forgings and large bar where the as-hot-worked strength is adequate and full annealing is uneconomic. | 650 | 760 | 14 | 25 HRC | 1.1 % IACS |
Cold worked | Choose for thin strip, tube and wire needing higher strength and straightness; ductility and weld ductility are reduced. | 780 | 860 | 8 | 29 HRC | 1.1 % IACS |
What is TA17?
TA17 is a low-alloy near-alpha titanium supplied as sheet, plate and bar, strengthened by modest alloy additions rather than by heat treatment and stocked in annealed, stress-relieved and as-welded conditions. Annealed material gives about 620 MPa yield, 730 MPa tensile, 16% elongation and 235 HB, and engineers pick it where CP titanium is too weak but weldability must stay high (weldability score 82). Service is limited to about 350 °C, machinability is poor (score 28) and there is no strengthening heat treatment; move to the TA15/BT20 class when higher strength is required. TA17 has a density of 4.48 g/cm³ (0.162 lb/in³), lighter than 71% of titanium grades. It melts at 1,650°C (3,002 °F). TA17 has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 730 MPa (106 ksi) — stronger than 50% of titanium grades. Elongation at break is 16% and the elastic modulus is 110 GPa (16 Msi).
What is TA17 used for?
- Airframe sheet-metal panels and skins
- Welded structural frames and brackets
- Aircraft ducting and tube assemblies
- Formed stiffeners and clips
- Welded sheet enclosures and covers
- Machined fittings from annealed bar
TA17 properties
Typical room-temperature values for TA17-M; bars are the position among titanium grades.
Physical3
TA17 has a density of 4.48 g/cm³ (0.162 lb/in³), lighter than 71% of titanium grades. It melts at 1,650°C (3,002 °F).
Mechanical16
TA17 has a yield strength of 620 MPa (89.9 ksi) and a tensile strength of 730 MPa (106 ksi) — stronger than 50% of titanium grades. Elongation at break is 16% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
TA17 is rated for continuous service to 350°C (662 °F). It conducts heat at 9 W/m·K (5.2 BTU/hr·ft·°F), better than 55% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
TA17 conducts electricity at 1.1 % IACS, worse than 67% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 53% of titanium grades.
Sustainability4
Producing a kilogram of TA17 takes about 650 MJ of energy and emits 40 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability8
TA17's machinability is poor (28/100, better than 59% of titanium grades); weldability very good (82/100); formability good (58/100).
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. TA17 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with TA17
Is TA17 easy to machine?
Low speed, heavy positive-rake carbide, rigid setup and flood coolant; avoid dwell and rubbing to prevent work hardening and fire risk from fine chips.
Can TA17 be welded?
Very good with GTAW, plasma or EBW using matching or CP-Ti filler under high-purity argon/trailing shield or vacuum; keep O/N/H pickup low and clean joints chemically before welding.
Can TA17 be formed, bent or molded?
Cold form in the annealed condition with generous bend radii (≈4–5t) and allow for springback; warm forming at 300–500 °C markedly improves formability and reduces residual stress.
TA17 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, main strengthener | 3.5 – 5 | 4.2 |
| Vbeta stabiliser for ductility/weldability | 1.5 – 3 | 2.2 |
| Fe | ≤ 0.25 | |
| Si | ≤ 0.12 | |
| C | ≤ 0.08 | |
| N | ≤ 0.05 | |
| H0.015 max for bar/forgings in some specs | ≤ 0.01 | |
| O | ≤ 0.15 | |
| Other, eachtotal others ≤ 0.40 | ≤ 0.1 | |
| Ti | balance |
What surface finishes work on TA17?
Pickle in HNO3/HF to remove alpha case after hot work; colour anodize or thermally oxidise for anti-galling, and use dry-film lube or coatings where titanium-on-titanium 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
How much does TA17 cost?
TA17 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.
TA17 — frequently asked
What is TA17 used for?
TA17 is typically used for airframe sheet-metal panels and skins, welded structural frames and brackets, aircraft ducting and tube assemblies, formed stiffeners and clips, welded sheet enclosures and covers and machined fittings from annealed bar. In short: weldable near-alpha sheet titanium; stronger than CP titanium; 350 °C service ceiling.
What is the yield strength of TA17?
TA17 has a typical yield strength of 620 MPa (89.9 ksi) and a tensile strength of 730 MPa (106 ksi) — stronger than 50% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is TA17 easy to machine?
Not especially — machinability is rated poor (28/100, better than 59% of titanium grades). Low speed, heavy positive-rake carbide, rigid setup and flood coolant; avoid dwell and rubbing to prevent work hardening and fire risk from fine chips.
Can TA17 be welded?
Yes — weldability is rated very good (82/100). Very good with GTAW, plasma or EBW using matching or CP-Ti filler under high-purity argon/trailing shield or vacuum; keep O/N/H pickup low and clean joints chemically before welding.
What surface finishes work on TA17?
Pickle in HNO3/HF to remove alpha case after hot work; colour anodize or thermally oxidise for anti-galling, and use dry-film lube or coatings where titanium-on-titanium contact occurs.
Can TA17 be formed, bent or molded?
Cold form in the annealed condition with generous bend radii (≈4–5t) and allow for springback; warm forming at 300–500 °C markedly improves formability and reduces residual stress.
What is the maximum service temperature of TA17?
TA17 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between TA17-M and TA17-Y?
M is the default condition — standard stocked condition: best combination of ductility, weldability and dimensional stability for structural sheet and plate. Y: choose for thin strip, tube and wire needing higher strength and straightness; ductility and weld ductility are reduced. Yield strength is 620 MPa in M versus 780 MPa in Y.
How much does TA17 cost?
TA17 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
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys (Titanium section) — ASM International (1990)
- Baoji titanium mill product datasheets (TA17 sheet/plate/bar) (2023)
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.