Nickel Alloy 925 vs Hastelloy X
Nickel Alloy · grade comparison
Nickel Alloy 925 and Hastelloy X are both nickel alloy grades. 925 is the stronger of the two: yield strength 830 MPa (120 ksi) against 360 MPa (52.2 ksi) for Hastelloy X, about 131% more; tensile strength follows at 1,210 MPa (175 ksi) vs 755 MPa (110 ksi). In exchange, Hastelloy X is the more ductile: elongation 43% versus 25% for 925, and 925 is harder (320 HB vs 195 HB). Hastelloy X runs hotter in service (1,150°C vs 540°C continuous) and 925 conducts heat better (11.1 W/m·K vs 9.1 W/m·K). On the shop floor, Hastelloy X welds better (excellent vs good) and Hastelloy X sits in a lower cost tier (premium, $$$) than 925 (high, $$$$).
925Choose it when strength drives the design.
Hastelloy XChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
925 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
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Compressive Strength
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)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 290 J/g125 BTU/lb
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.5 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Castability
Same in both: Machinability 18 / 100 · 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 | 925 | 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.
925 vs Hastelloy X — frequently asked
Is 925 stronger than Hastelloy X?
Yes. 925 has a typical yield strength of 830 MPa (120 ksi) against 360 MPa (52.2 ksi) for Hastelloy X — about 131% more. Tensile strength is 1,210 MPa (175 ksi) vs 755 MPa (110 ksi).
Which is cheaper, 925 or Hastelloy X?
Hastelloy X is the lower-cost material: it sits in the premium tier ($$$) while 925 is high ($$$$). 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, 925 or Hastelloy X?
Hastelloy X. Its weldability rates excellent (85/100) against good (55/100) for 925.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 925 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.