Nickel Alloy Monel K500 vs Nitinol
Nickel Alloy · grade comparison
Nickel Alloy Monel K500 and Nitinol are both nickel alloy grades. Nitinol is the stronger of the two: yield strength 400 MPa (58 ksi) against 310 MPa (45 ksi) for Monel K500, about 29% more; tensile strength follows at 950 MPa (138 ksi) vs 690 MPa (100 ksi). In exchange, Monel K500 is the more ductile: elongation 45% versus 30% for Nitinol, and Monel K500 is harder (30 HRC vs 22 HRC). Nitinol is lighter (6.45 g/cm³ vs 8.44 g/cm³ for Monel K500) and Monel K500 is stiffer (179 GPa vs 75 GPa). On the shop floor, Monel K500 welds better (good vs fair).
Monel K500Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
NitinolChoose it when strength drives the design, or when weight is the constraint.
Monel K500 vs Nitinol: 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 B
Hardness, Rockwell C
Compressive Strength
Hardness, Vickers
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)
Min Service Temperature
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
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 | Monel K500 | Nitinol |
|---|---|---|
| Default condition | O | O |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | 1.5 mm | 1.5 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
Both are offered for CNC machining and Sheet metal. Both take the same 5 finishes: Electropolishing, Gold Plating, HVOF Coating, Plasma Spray, Silver Plating.
Monel K500 vs Nitinol — frequently asked
Is Nitinol stronger than Monel K500?
Yes. Nitinol has a typical yield strength of 400 MPa (58 ksi) against 310 MPa (45 ksi) for Monel K500 — about 29% more. Tensile strength is 950 MPa (138 ksi) vs 690 MPa (100 ksi).
Which is cheaper, Monel K500 or Nitinol?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Monel K500 or Nitinol?
Monel K500. Its machinability rates poor (18/100) against not recommended (12/100) for Nitinol; for welding the order is Monel K500 first (good, 65/100) then Nitinol (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Monel K500 and Nitinol 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.