Refractory Metal Pure Ta As Rolled vs Pure Ta Vacuum Annealed
Refractory Metal · Pure Ta temper comparison
Pure Ta As Rolled and Pure Ta Vacuum Annealed are two conditions of the same refractory metal grade, Pure Ta: As Rolled (hot rolled) versus Vacuum Annealed (recrystallized, softest condition). The chemistry is identical, so every difference below comes from the condition. Pure Ta As Rolled is the stronger of the two: yield strength 390 MPa (56.6 ksi) against 170 MPa (24.7 ksi) for Pure Ta Vacuum Annealed, about 129% more; tensile strength follows at 450 MPa (65.3 ksi) vs 250 MPa (36.3 ksi). In exchange, Pure Ta Vacuum Annealed is the more ductile: elongation 38% versus 8% for Pure Ta As Rolled, and Pure Ta As Rolled is harder (175 HV vs 95 HV). Pure Ta Vacuum Annealed runs hotter in service (300°C vs 250°C continuous). On the shop floor, Pure Ta As Rolled machines more easily (32 vs 22 out of 100).
Pure Ta As RolledChoose it when strength drives the design, or when the part is machined in volume.
Pure Ta Vacuum AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Pure Ta As Rolled vs Pure Ta Vacuum Annealed: 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.
Pure Ta As RolledPure Ta Vacuum Annealed
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 186 GPa27 Msi · Shear Modulus 69 GPa10 Msi · Bulk Modulus 200 GPa29 Msi · Poisson's Ratio 0.34 · Hardness, Brinell 95 HB
Physical
Density and transition temperatures.
Same in both: Density 16.6 g/cm³0.6 lb/in³ · Melting Point (Solidus) 2,996°C5,425 °F · Liquidus Temperature 2,996°C5,425 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 57.5 W/m·K33.2 BTU/hr·ft·°F · 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 202 J/g86.8 BTU/lb · 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) -0.1 V · Corrosion Resistance 97 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 20% · Castability 10 / 100 · Brazeability / Solderability 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 4,200 MJ/kg1,805,677 BTU/lb · Embodied Carbon (primary production) 260 kg CO₂/kg · Embodied Water 700 L/kg83.9 gal/lb · Typical Recycled Content 25%
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.
Pure Ta As Rolled vs Pure Ta Vacuum Annealed — frequently asked
Is Pure Ta As Rolled stronger than Pure Ta Vacuum Annealed?
Yes. Pure Ta As Rolled has a typical yield strength of 390 MPa (56.6 ksi) against 170 MPa (24.7 ksi) for Pure Ta Vacuum Annealed — about 129% more. Tensile strength is 450 MPa (65.3 ksi) vs 250 MPa (36.3 ksi).
Which condition does FabDigit quote by default, As Rolled or Vacuum Annealed?
Vacuum Annealed is the default Pure Ta condition in the FabDigit quote flow. 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, Pure Ta As Rolled or Pure Ta Vacuum Annealed?
Pure Ta As Rolled, by a small margin. Both rate poor for machinability — 32/100 against 22/100 for Pure Ta Vacuum Annealed; for welding the order is Pure Ta Vacuum Annealed first (very good, 72/100) then Pure Ta As Rolled (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Pure Ta As Rolled and Pure Ta Vacuum Annealed 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.