Refractory Metal Ta-2.5W Cold Worked vs Ta-2.5W Stress Relieved
Refractory Metal · Ta-2.5W temper comparison
Ta-2.5W Cold Worked and Ta-2.5W Stress Relieved are two conditions of the same refractory metal grade, Ta-2.5W: Cold Worked versus Stress Relieved. The chemistry is identical, so every difference below comes from the condition. Ta-2.5W Cold Worked is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 440 MPa (63.8 ksi) for Ta-2.5W Stress Relieved, about 41% more; tensile strength follows at 690 MPa (100 ksi) vs 520 MPa (75.4 ksi). In exchange, Ta-2.5W Stress Relieved is the more ductile: elongation 15% versus 5% for Ta-2.5W Cold Worked, and Ta-2.5W Cold Worked is harder (215 HB vs 160 HB). On the shop floor, Ta-2.5W Stress Relieved welds better (very good vs good).
Ta-2.5W Cold WorkedChoose it when strength drives the design.
Ta-2.5W Stress RelievedChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
Ta-2.5W Cold Worked vs Ta-2.5W Stress Relieved: 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.
Ta-2.5W Cold WorkedTa-2.5W Stress Relieved
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 72 GPa10.4 Msi · Bulk Modulus 200 GPa29 Msi · Poisson's Ratio 0.35
Physical
Density and transition temperatures.
Same in both: Density 16.7 g/cm³0.6 lb/in³ · Melting Point (Solidus) 3,030°C5,486 °F · Liquidus Temperature 3,040°C5,504 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
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 · Latent Heat of Fusion 200 J/g86 BTU/lb · 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).
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 V · 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)
Same in both: Castability 25 / 100 · Brazeability / Solderability 65 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 4,400 MJ/kg1,891,661 BTU/lb · Embodied Carbon (primary production) 260 kg CO₂/kg · Typical Recycled Content 20%
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.
Ta-2.5W Cold Worked vs Ta-2.5W Stress Relieved — frequently asked
Is Ta-2.5W Cold Worked stronger than Ta-2.5W Stress Relieved?
Yes. Ta-2.5W Cold Worked has a typical yield strength of 620 MPa (89.9 ksi) against 440 MPa (63.8 ksi) for Ta-2.5W Stress Relieved — about 41% more. Tensile strength is 690 MPa (100 ksi) vs 520 MPa (75.4 ksi).
Which condition does FabDigit quote by default, Cold Worked or Stress Relieved?
Vacuum Annealed is the default Ta-2.5W condition in the FabDigit quote flow (neither Cold Worked nor Stress Relieved). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, Ta-2.5W Cold Worked or Ta-2.5W Stress Relieved?
Ta-2.5W Cold Worked, by a small margin. Both rate poor for machinability — 28/100 against 22/100 for Ta-2.5W Stress Relieved; for welding the order is Ta-2.5W Stress Relieved first (very good, 75/100) then Ta-2.5W Cold Worked (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ta-2.5W Cold Worked and Ta-2.5W Stress Relieved 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.