Refractory Metal Ta-10W
UNS R05255 · ASTM B365
Higher tungsten content tantalum alloy providing significantly increased strength and elevated-temperature performance versus unalloyed tantalum, used in demanding aerospace and ordnance applications.
Reference datasheet — Ta-10W 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 ANN condition
Ta-10W tempers and conditions
Ta-10W is supplied in 3 conditions, soft to hard. ANN 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 |
|---|---|---|---|---|---|---|
ANNDefault Annealed | Pick the standard vacuum recrystallization annealed supply state for deep drawing, spinning and welded structures; 690 MPa tensile with 25 % elongation balances strength and ductility. | 550 | 690 | 25 | 225 HB | — |
Stress relieved | Choose cold work followed by a stress-relief anneal when 720 MPa yield is needed with residual stresses removed and useful ductility, 15 % elongation, still retained. | 720 | 830 | 15 | 28 HRC | 6.8 % IACS |
Cold worked | Use the as-rolled or as-drawn hard state (≥50 % reduction) for high-strength fasteners, thin foil and spring elements; ductility falls to 5 %, so anneal before forming, and hot service recrystallizes and softens it. | 930 | 1,030 | 5 | 34 HRC | 6.5 % IACS |
What is Ta-10W?
Higher tungsten content tantalum alloy providing significantly increased strength and elevated-temperature performance versus unalloyed tantalum, used in demanding aerospace and ordnance applications. Ta-10W has a density of 16.8 g/cm³ (0.607 lb/in³), heavier than 89% of refractory metal grades. It melts at 3,030°C (5,486 °F). Ta-10W has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 76% of refractory metal grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
What is Ta-10W used for?
- shaped charge liners
- high-temperature aerospace components
- furnace hardware
- high-strength corrosion-resistant fasteners
Advantages
- Good corrosion resistance — 95/100, better than 94% of refractory metal grades
- High strength — 550 MPa (79.8 ksi), better than 76% of refractory metal grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 95% of refractory metal grades
- Heavy — 16.8 g/cm³ (0.607 lb/in³), worse than 89% of refractory metal grades
- High embodied carbon — 220 kg CO₂/kg, worse than 87% of refractory metal grades
Ta-10W properties
Typical room-temperature values for Ta-10W-ANN; bars are the position among refractory metal grades.
Physical3
Ta-10W has a density of 16.8 g/cm³ (0.607 lb/in³), heavier than 89% of refractory metal grades. It melts at 3,030°C (5,486 °F).
Mechanical13
Ta-10W has a yield strength of 550 MPa (79.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 76% of refractory metal grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
Ta-10W is rated for continuous service to 300°C (572 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 56% of refractory metal grades. Thermal expansion is 6.5 µm/m·K (3.61 µin/in·°F).
Electrical3
Ta-10W conducts electricity at 7 % IACS, better than 54% of refractory metal grades.
Chemical & Environmental2
Corrosion resistance is excellent (95/100), better than 94% of refractory metal grades.
Sustainability4
Producing a kilogram of Ta-10W takes about 3,600 MJ of energy and emits 220 kg of CO₂ — more than 87% of refractory metal grades. Typical recycled content is 25%.
Manufacturability8
Ta-10W's machinability is poor (25/100, worse than 65% of refractory metal grades); weldability very good (70/100); formability good (55/100).
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 refractory metal family
Yield strength against density for every refractory metal grade FabDigit runs. Ta-10W is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ta-10W
Is Ta-10W easy to machine?
The alloy sticks badly to the tool: use sharp positive-rake carbide or HSS, low speeds with large depth of cut, and heavy emulsion coolant to suppress frictional heat and built-up edge.
Can Ta-10W be welded?
GTAW must be performed in an argon-filled glovebox or under a high-purity gas shield, or use electron-beam or laser welding. Degrease and remove all oxide before welding to prevent O/N/H contamination embrittling the weld.
Can Ta-10W be formed, bent or molded?
Ductility is good in the annealed condition, allowing cold stamping, spinning and deep drawing. It work-hardens quickly, so vacuum interanneal at about 1200–1450 °C and use anti-galling coated or lubricated dies.
Ta-10W 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 |
|---|---|---|
| Wprimary solid-solution strengthening element | 9 – 11 | 10 |
| Nb | ≤ 0.1 | |
| Mo | ≤ 0.02 | |
| Fe | ≤ 0.01 | |
| Ni | ≤ 0.01 | |
| Ti | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| C | ≤ 0.01 | |
| O | ≤ 0.02 | |
| N | ≤ 0.01 | |
| HH must be very low to prevent embrittlement | ≤ 0 | |
| Ta | balance |
What surface finishes work on Ta-10W?
Electropolish or chemically polish in HF/HNO3 mixed acid with appropriate protection. Anodizing can be used to build a functional Ta2O5 film; decorative coatings are normally not applied.
Equivalent designations
Standards and trade names that resolve to Refractory Metal Ta-10W in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R05255
- ASTM
- B365
How much does Ta-10W cost?
Ta-10W is a high-cost refractory metal ($$$$), 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.
Ta-10W — frequently asked
What is Ta-10W used for?
Ta-10W is typically used for shaped charge liners, high-temperature aerospace components, furnace hardware and high-strength corrosion-resistant fasteners. In short: strongest common tantalum alloy; shaped-charge liner grade; corrosion resistance retained.
What is the yield strength of Ta-10W?
Ta-10W has a typical yield strength of 550 MPa (79.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 76% of refractory metal grades. Strength varies by condition: see the 3 listed tempers.
Is Ta-10W easy to machine?
Not especially — machinability is rated poor (25/100, worse than 65% of refractory metal grades). The alloy sticks badly to the tool: use sharp positive-rake carbide or HSS, low speeds with large depth of cut, and heavy emulsion coolant to suppress frictional heat and built-up edge.
Can Ta-10W be welded?
Yes — weldability is rated very good (70/100). GTAW must be performed in an argon-filled glovebox or under a high-purity gas shield, or use electron-beam or laser welding. Degrease and remove all oxide before welding to prevent O/N/H contamination embrittling the weld.
What surface finishes work on Ta-10W?
Electropolish or chemically polish in HF/HNO3 mixed acid with appropriate protection. Anodizing can be used to build a functional Ta2O5 film; decorative coatings are normally not applied.
Can Ta-10W be formed, bent or molded?
Ductility is good in the annealed condition, allowing cold stamping, spinning and deep drawing. It work-hardens quickly, so vacuum interanneal at about 1200–1450 °C and use anti-galling coated or lubricated dies.
What is the maximum service temperature of Ta-10W?
Ta-10W is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ta-10W-ANN and Ta-10W-CW?
ANN is the default condition — pick the standard vacuum recrystallization annealed supply state for deep drawing, spinning and welded structures; 690 MPa tensile with 25 % elongation balances strength and ductility. CW: use the as-rolled or as-drawn hard state (≥50 % reduction) for high-strength fasteners, thin foil and spring elements; ductility falls to 5 %, so anneal before forming, and hot service recrystallizes and softens it. Yield strength is 550 MPa in ANN versus 930 MPa in CW.
How much does Ta-10W cost?
Ta-10W is a high-cost refractory metal ($$$$), 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
- ASTM B365 — Tantalum and Tantalum Alloy Rod and Wire — ASTM International (2018)
- ASTM B708 — Tantalum and Tantalum Alloy Plate, Sheet, and Strip — ASTM International (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Refractory Metals) — ASM International (1990)
- Tantalum and tantalum alloy (Ta-2.5W / Ta-10W) mill products data — H.C. Starck / Plansee (2021)
- Metal life-cycle energy and GHG inventory (tantalum) — Nuss & Eckelman, PLoS ONE (2014)
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.