Refractory Metal Pure Ta vs Ta-2.5W
Refractory Metal · grade comparison
Refractory Metal Pure Ta and Ta-2.5W are both refractory metal grades. Ta-2.5W is the stronger of the two: yield strength 310 MPa (45 ksi) against 170 MPa (24.7 ksi) for Pure Ta, about 82% more; tensile strength follows at 415 MPa (60.2 ksi) vs 250 MPa (36.3 ksi). In exchange, Pure Ta is the more ductile: elongation 38% versus 28% for Ta-2.5W, and Ta-2.5W is harder (115 HB vs 95 HB). Ta-2.5W is stiffer (200 GPa vs 186 GPa) and Pure Ta conducts electricity better (12.8 % IACS vs 9.9 % IACS).
Pure TaChoose it when the part is bent, formed or impact-loaded.
Ta-2.5WChoose it when strength drives the design.
Pure Ta vs Ta-2.5W: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all refractory metal grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all refractory metal grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Compressive Strength
Same in both: Bulk Modulus 200 GPa29 Msi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Latent Heat of Fusion
Same in both: Specific Heat Capacity 140 J/kg·K0.03 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 6.5 µm/m·K3.6 µin/in·°F · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Same in both: Corrosion Resistance 97 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 260 kg CO₂/kg
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Pure Ta | Ta-2.5W |
|---|---|---|
| Default condition | Vacuum Annealed | Vacuum Annealed |
| Relative cost | $$$$$ Specialty | $$$$$ Specialty |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Pure Ta vs Ta-2.5W — frequently asked
Is Ta-2.5W stronger than Pure Ta?
Yes. Ta-2.5W has a typical yield strength of 310 MPa (45 ksi) against 170 MPa (24.7 ksi) for Pure Ta — about 82% more. Tensile strength is 415 MPa (60.2 ksi) vs 250 MPa (36.3 ksi).
Which is cheaper, Pure Ta or Ta-2.5W?
Both sit in the same relative cost tier ($$$$$, specialty); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, Pure Ta or Ta-2.5W?
Ta-2.5W. Its weldability rates very good (80/100) against very good (72/100) for Pure Ta.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pure Ta and Ta-2.5W side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.