Nickel Alloy Incoloy 925 vs Inconel 718
Nickel Alloy · grade comparison
Nickel Alloy Incoloy 925 and Inconel 718 are both nickel alloy grades. Incoloy 925 is the stronger of the two: yield strength 890 MPa (129 ksi) against 550 MPa (79.8 ksi) for Inconel 718, about 62% more; tensile strength follows at 1,170 MPa (170 ksi) vs 965 MPa (140 ksi). In exchange, Inconel 718 is the more ductile: elongation 45% versus 26% for Incoloy 925, and Incoloy 925 is harder (310 HB vs 200 HB). On the shop floor, Inconel 718 welds better (very good vs good) and Inconel 718 sits in a lower cost tier (premium, $$$) than Incoloy 925 (high, $$$$).
Incoloy 925Choose it when strength drives the design.
Inconel 718Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
Incoloy 925 vs Inconel 718: 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.
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
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Min Service Temperature
Same in both: Thermal Conductivity 11.4 W/m·K6.6 BTU/hr·ft·°F · Specific Heat Capacity 435 J/kg·K0.1 BTU/lb·°F · Max Service Temperature (continuous) 540°C1,004 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
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 Shock Resistance Index
Same in both: Thermal Diffusivity 3.2 mm²/s
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 | Incoloy 925 | Inconel 718 |
|---|---|---|
| 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.
Incoloy 925 vs Inconel 718 — frequently asked
Is Incoloy 925 stronger than Inconel 718?
Yes. Incoloy 925 has a typical yield strength of 890 MPa (129 ksi) against 550 MPa (79.8 ksi) for Inconel 718 — about 62% more. Tensile strength is 1,170 MPa (170 ksi) vs 965 MPa (140 ksi).
Which is cheaper, Incoloy 925 or Inconel 718?
Inconel 718 is the lower-cost material: it sits in the premium tier ($$$) while Incoloy 925 is high ($$$$). 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, Incoloy 925 or Inconel 718?
Inconel 718. Its weldability rates very good (70/100) against good (55/100) for Incoloy 925.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Incoloy 925 and Inconel 718 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.