Refractory Metal Mo-47.5Re vs W-3Re
Refractory Metal · grade comparison
Refractory Metal Mo-47.5Re and W-3Re are both refractory metal grades. W-3Re is the stronger of the two: yield strength 1,750 MPa (254 ksi) against 1,000 MPa (145 ksi) for Mo-47.5Re, about 75% more; tensile strength follows at 2,100 MPa (305 ksi) vs 1,240 MPa (180 ksi). In exchange, Mo-47.5Re is the more ductile: elongation 12% versus 3% for W-3Re, and W-3Re is harder (52 HRC vs 34 HRC). Mo-47.5Re is lighter (13.5 g/cm³ vs 19.4 g/cm³ for W-3Re) and W-3Re is stiffer (395 GPa vs 360 GPa). On the shop floor, Mo-47.5Re welds better (very good vs poor).
Mo-47.5ReChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
W-3ReChoose it when strength drives the design, or when the part sees heat.
Mo-47.5Re vs W-3Re: 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
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).
Corrosion Resistance
Galvanic Potential (seawater, vs SCE)
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
Same in both: Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Embodied Water
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 | W-3Re |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Mo-47.5Re vs W-3Re — frequently asked
Is W-3Re stronger than Mo-47.5Re?
Yes. W-3Re has a typical yield strength of 1,750 MPa (254 ksi) against 1,000 MPa (145 ksi) for Mo-47.5Re — about 75% more. Tensile strength is 2,100 MPa (305 ksi) vs 1,240 MPa (180 ksi).
Which is cheaper, Mo-47.5Re or W-3Re?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Mo-47.5Re or W-3Re?
Mo-47.5Re. Its machinability rates poor (18/100) against not recommended (10/100) for W-3Re; for welding the order is Mo-47.5Re first (very good, 75/100) then W-3Re (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Mo-47.5Re and W-3Re 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.