Tungsten Alloy 90W-7Ni-3Cu vs W (99.95% CP Tungsten)
Tungsten Alloy · grade comparison
Tungsten Alloy 90W-7Ni-3Cu and W (99.95% CP Tungsten) are both tungsten alloy grades. W (99.95% CP Tungsten) is the stronger of the two: yield strength 750 MPa (109 ksi) against 550 MPa (79.8 ksi) for 90W-7Ni-3Cu, about 36% more; tensile strength follows at 950 MPa (138 ksi) vs 700 MPa (102 ksi). In exchange, 90W-7Ni-3Cu is the more ductile: elongation 3% versus 2% for W (99.95% CP Tungsten), and W (99.95% CP Tungsten) is harder (415 HB vs 275 HB). 90W-7Ni-3Cu is lighter (17 g/cm³ vs 19.25 g/cm³ for W (99.95% CP Tungsten)) and W (99.95% CP Tungsten) is stiffer (400 GPa vs 320 GPa). On the shop floor, 90W-7Ni-3Cu machines more easily (fair vs not recommended).
90W-7Ni-3CuChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
W (99.95% CP Tungsten)Choose it when strength drives the design, or when the part sees heat.
90W-7Ni-3Cu vs W (99.95% CP Tungsten): propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all tungsten alloy 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 tungsten alloy 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.
90W-7Ni-3CuW (99.95% CP Tungsten)
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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
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)
Max Service Temperature (continuous)
Min Service Temperature
Latent Heat of Fusion
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 %)
Formability (cold)
Castability
Polishability
Same in both: Weldability 12 / 100 · Brazeability / Solderability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
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 tungsten alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | 90W-7Ni-3Cu | W (99.95% CP Tungsten) |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
90W-7Ni-3Cu vs W (99.95% CP Tungsten) — frequently asked
Is W (99.95% CP Tungsten) stronger than 90W-7Ni-3Cu?
Yes. W (99.95% CP Tungsten) has a typical yield strength of 750 MPa (109 ksi) against 550 MPa (79.8 ksi) for 90W-7Ni-3Cu — about 36% more. Tensile strength is 950 MPa (138 ksi) vs 700 MPa (102 ksi).
Which is cheaper, 90W-7Ni-3Cu or W (99.95% CP Tungsten)?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 90W-7Ni-3Cu or W (99.95% CP Tungsten)?
90W-7Ni-3Cu. Its machinability rates fair (40/100) against not recommended (12/100) for W (99.95% CP Tungsten).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 90W-7Ni-3Cu and W (99.95% CP Tungsten) 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.