Nickel Alloy Hastelloy W vs Hastelloy X
Nickel Alloy · grade comparison
Nickel Alloy Hastelloy W and Hastelloy X are both nickel alloy grades. Hastelloy W is the stronger of the two: yield strength 400 MPa (58 ksi) against 360 MPa (52.2 ksi) for Hastelloy X, about 11% more; tensile strength follows at 855 MPa (124 ksi) vs 755 MPa (110 ksi). Hastelloy X is lighter (8.22 g/cm³ vs 9.03 g/cm³ for Hastelloy W) and Hastelloy W is stiffer (216 GPa vs 205 GPa). On the shop floor, Hastelloy X sits in a lower cost tier (premium, $$$) than Hastelloy W (high, $$$$).
Hastelloy WChoose it when strength drives the design.
Hastelloy XChoose it when weight is the constraint, or when the part sees heat.
Hastelloy W vs Hastelloy X: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all nickel 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 nickel 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear 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)
Charpy V-Notch Impact (RT)
Hardness, Rockwell B
Fracture Toughness (K_IC)
Same in both: Bulk Modulus 190 GPa27.6 Msi · Hardness, Brinell 195 HB · Hardness, Vickers 205 HV
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)
Same in both: Latent Heat of Fusion 290 J/g125 BTU/lb · Min Service Temperature -196°C-321 °F
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
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Same in both: Machinability Rating (AISI 1212 = 100 %) 12%
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 35%
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 nickel alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Hastelloy W | Hastelloy X |
|---|---|---|
| CNC machining | — | Yes |
| Sheet metal | — | Yes |
| 3D printing | — | Yes |
| Default condition | — | Solution Annealed |
| Relative cost | $$$$ High | $$$ Premium |
| Min. machined wall | — | 1.5 mm |
| Best machined surface | — | Ra 1.6 µm |
| Electropolishing | — | Yes |
| HVOF Coating | — | Yes |
They share 3 finishes: Gold Plating, Plasma Spray, Silver Plating.
Hastelloy W vs Hastelloy X — frequently asked
Is Hastelloy W stronger than Hastelloy X?
Yes. Hastelloy W has a typical yield strength of 400 MPa (58 ksi) against 360 MPa (52.2 ksi) for Hastelloy X — about 11% more. Tensile strength is 855 MPa (124 ksi) vs 755 MPa (110 ksi).
Which is cheaper, Hastelloy W or Hastelloy X?
Hastelloy X is the lower-cost material: it sits in the premium tier ($$$) while Hastelloy W is high ($$$$). 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, Hastelloy W or Hastelloy X?
Hastelloy X. Its weldability rates excellent (85/100) against very good (80/100) for Hastelloy W.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hastelloy W and Hastelloy X 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.