Nickel Alloy Alloy 42 vs N09777
Nickel Alloy · grade comparison
Nickel Alloy Alloy 42 and N09777 are both nickel alloy grades. N09777 is the stronger of the two: yield strength 1,000 MPa (145 ksi) against 270 MPa (39.2 ksi) for Alloy 42, about 3.7 times as much; tensile strength follows at 1,275 MPa (185 ksi) vs 520 MPa (75.4 ksi). In exchange, Alloy 42 is the more ductile: elongation 35% versus 15% for N09777, and N09777 is harder (400 HV vs 150 HV). N09777 is stiffer (160 GPa vs 145 GPa) and N09777 runs hotter in service (650°C vs 400°C continuous). On the shop floor, Alloy 42 welds better (very good vs fair).
Alloy 42Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
N09777Choose it when strength drives the design, or when the part sees heat.
Alloy 42 vs N09777: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Fracture Toughness (K_IC)
Hardness, Rockwell C
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)
Same in both: 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Castability
Same in both: Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 25%
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 | Alloy 42 | N09777 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 3 finishes: Gold Plating, Plasma Spray, Silver Plating.
Alloy 42 vs N09777 — frequently asked
Is N09777 stronger than Alloy 42?
Yes. N09777 has a typical yield strength of 1,000 MPa (145 ksi) against 270 MPa (39.2 ksi) for Alloy 42 — about 3.7 times as much. Tensile strength is 1,275 MPa (185 ksi) vs 520 MPa (75.4 ksi).
Which is cheaper, Alloy 42 or N09777?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Alloy 42 or N09777?
Alloy 42, by a small margin. Both rate poor for machinability — 28/100 against 22/100 for N09777; for welding the order is Alloy 42 first (very good, 70/100) then N09777 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 42 and N09777 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.