Nickel Alloy Alloy 22 vs Alloy 31
Nickel Alloy · grade comparison
Nickel Alloy Alloy 22 and Alloy 31 are both nickel alloy grades. Alloy 22 is the stronger of the two: yield strength 400 MPa (58 ksi) against 340 MPa (49.3 ksi) for Alloy 31, about 18% more; tensile strength follows at 800 MPa (116 ksi) vs 700 MPa (102 ksi). Alloy 22 is the more ductile: elongation 62% versus 50% for Alloy 31, and Alloy 22 is harder (200 HB vs 180 HB). Alloy 31 is lighter (8.02 g/cm³ vs 8.69 g/cm³ for Alloy 22) and Alloy 22 is stiffer (206 GPa vs 195 GPa). On the shop floor, Alloy 22 welds better (excellent vs very good).
Alloy 22Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Alloy 31Choose it when weight is the constraint.
Alloy 22 vs Alloy 31: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Reduction in Area 65% · Hardness, Rockwell B 88 HRB
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 285 J/g123 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Castability 35 / 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
Same in both: Thermal Shock Resistance Index 3
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 22 | Alloy 31 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 3 finishes: Gold Plating, Plasma Spray, Silver Plating.
Alloy 22 vs Alloy 31 — frequently asked
Is Alloy 22 stronger than Alloy 31?
Yes. Alloy 22 has a typical yield strength of 400 MPa (58 ksi) against 340 MPa (49.3 ksi) for Alloy 31 — about 18% more. Tensile strength is 800 MPa (116 ksi) vs 700 MPa (102 ksi).
Which is cheaper, Alloy 22 or Alloy 31?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Alloy 22 or Alloy 31?
Alloy 31, by a small margin. Both rate poor for machinability — 22/100 against 15/100 for Alloy 22; for welding the order is Alloy 22 first (excellent, 85/100) then Alloy 31 (very good, 72/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 22 and Alloy 31 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.