Nickel Alloy Alloy 31 vs Hastelloy C276
Nickel Alloy · grade comparison
Nickel Alloy Alloy 31 and Hastelloy C276 are both nickel alloy grades. Hastelloy C276 is the stronger of the two: yield strength 360 MPa (52.2 ksi) against 340 MPa (49.3 ksi) for Alloy 31, about 6% more; tensile strength follows at 790 MPa (115 ksi) vs 700 MPa (102 ksi). Hastelloy C276 is the more ductile: elongation 60% versus 50% for Alloy 31, and Hastelloy C276 is harder (194 HB vs 180 HB). Alloy 31 is lighter (8.02 g/cm³ vs 8.89 g/cm³ for Hastelloy C276) and Hastelloy C276 runs hotter in service (650°C vs 400°C continuous). On the shop floor, Hastelloy C276 welds better (excellent vs very good) and Hastelloy C276 sits in a lower cost tier (premium, $$$) than Alloy 31 (high, $$$$).
Alloy 31Choose it when weight is the constraint.
Hastelloy C276Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Alloy 31 vs Hastelloy C276: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Fracture Toughness (K_IC)
Same in both: Reduction in Area 65%
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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 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 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 31 | Hastelloy C276 |
|---|---|---|
| CNC machining | — | Yes |
| Sheet metal | — | 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.
Alloy 31 vs Hastelloy C276 — frequently asked
Is Hastelloy C276 stronger than Alloy 31?
Yes. Hastelloy C276 has a typical yield strength of 360 MPa (52.2 ksi) against 340 MPa (49.3 ksi) for Alloy 31 — about 6% more. Tensile strength is 790 MPa (115 ksi) vs 700 MPa (102 ksi).
Which is cheaper, Alloy 31 or Hastelloy C276?
Hastelloy C276 is the lower-cost material: it sits in the premium tier ($$$) while Alloy 31 is high ($$$$). 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, Alloy 31 or Hastelloy C276?
Hastelloy C276. Its weldability rates excellent (85/100) against very good (72/100) for Alloy 31.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 31 and Hastelloy C276 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.