Refractory Metal Nuclear Grade Hafnium (R1) vs Ta-2.5W
Refractory Metal · grade comparison
Refractory Metal Nuclear Grade Hafnium (R1) 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 240 MPa (34.8 ksi) for Nuclear Grade Hafnium (R1), about 29% more. Ta-2.5W is the more ductile: elongation 28% versus 25% for Nuclear Grade Hafnium (R1), and Nuclear Grade Hafnium (R1) is harder (160 HB vs 115 HB). Nuclear Grade Hafnium (R1) is lighter (13.31 g/cm³ vs 16.7 g/cm³ for Ta-2.5W) and Ta-2.5W is stiffer (200 GPa vs 140 GPa). On the shop floor, Nuclear Grade Hafnium (R1) machines more easily (30 vs 18 out of 100), Ta-2.5W welds better (very good vs good), and Nuclear Grade Hafnium (R1) sits in a lower cost tier (high, $$$$) than Ta-2.5W (specialty, $$$$$).
Nuclear Grade Hafnium (R1)Choose it when weight is the constraint, or when the part sees heat.
Ta-2.5WChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Nuclear Grade Hafnium (R1) 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.
Nuclear Grade Hafnium (R1)Ta-2.5W
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Compressive Strength
Fatigue Strength (Endurance Limit)
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
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
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 Carbon (primary production)
Typical Recycled Content
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 | Nuclear Grade Hafnium (R1) | Ta-2.5W |
|---|---|---|
| Default condition | — | Vacuum Annealed |
| Relative cost | $$$$ High | $$$$$ Specialty |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Nuclear Grade Hafnium (R1) vs Ta-2.5W — frequently asked
Is Ta-2.5W stronger than Nuclear Grade Hafnium (R1)?
Yes. Ta-2.5W has a typical yield strength of 310 MPa (45 ksi) against 240 MPa (34.8 ksi) for Nuclear Grade Hafnium (R1) — about 29% more. Tensile strength is 415 MPa (60.2 ksi) vs 445 MPa (64.5 ksi).
Which is cheaper, Nuclear Grade Hafnium (R1) or Ta-2.5W?
Nuclear Grade Hafnium (R1) is the lower-cost material: it sits in the high tier ($$$$) while Ta-2.5W is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Nuclear Grade Hafnium (R1) or Ta-2.5W?
Nuclear Grade Hafnium (R1), by a small margin. Both rate poor for machinability — 30/100 against 18/100 for Ta-2.5W; for welding the order is Ta-2.5W first (very good, 80/100) then Nuclear Grade Hafnium (R1) (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Nuclear Grade Hafnium (R1) 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.