Refractory Metal Mo-47.5Re vs Ta-2.5W
Refractory Metal · grade comparison
Refractory Metal Mo-47.5Re and Ta-2.5W are both refractory metal grades. Mo-47.5Re is the stronger of the two: yield strength 1,000 MPa (145 ksi) against 310 MPa (45 ksi) for Ta-2.5W, about 3.2 times as much; tensile strength follows at 1,240 MPa (180 ksi) vs 415 MPa (60.2 ksi). In exchange, Ta-2.5W is the more ductile: elongation 28% versus 12% for Mo-47.5Re, and Mo-47.5Re is harder (340 HV vs 120 HV). Mo-47.5Re is lighter (13.5 g/cm³ vs 16.7 g/cm³ for Ta-2.5W) and Mo-47.5Re is stiffer (360 GPa vs 200 GPa). On the shop floor, Mo-47.5Re sits in a lower cost tier (high, $$$$) than Ta-2.5W (specialty, $$$$$).
Mo-47.5ReChoose it when strength drives the design, or when weight is the constraint.
Ta-2.5WChoose it when the part is bent, formed or impact-loaded.
Mo-47.5Re 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
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Hardness, Rockwell C
Hardness, Vickers
Compressive Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
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)
Same in both: Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Galvanic Potential (seawater, vs SCE)
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability 18 / 100
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 | Mo-47.5Re | Ta-2.5W |
|---|---|---|
| Default condition | — | Vacuum Annealed |
| Relative cost | $$$$ High | $$$$$ Specialty |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Mo-47.5Re vs Ta-2.5W — frequently asked
Is Mo-47.5Re stronger than Ta-2.5W?
Yes. Mo-47.5Re has a typical yield strength of 1,000 MPa (145 ksi) against 310 MPa (45 ksi) for Ta-2.5W — about 3.2 times as much. Tensile strength is 1,240 MPa (180 ksi) vs 415 MPa (60.2 ksi).
Which is cheaper, Mo-47.5Re or Ta-2.5W?
Mo-47.5Re is the lower-cost material: it sits in the high tier ($$$$) while Ta-2.5W is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, Mo-47.5Re or Ta-2.5W?
Ta-2.5W. Its weldability rates very good (80/100) against very good (75/100) for Mo-47.5Re.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Mo-47.5Re 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.