Nickel Alloy Monel R-405 vs Nitinol
Nickel Alloy · grade comparison
Nickel Alloy Monel R-405 and Nitinol are both nickel alloy grades. Monel R-405 is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 400 MPa (58 ksi) for Nitinol, about 13% more. In exchange, Nitinol is the more ductile: elongation 30% versus 22% for Monel R-405. Nitinol is lighter (6.45 g/cm³ vs 8.83 g/cm³ for Monel R-405) and Monel R-405 is stiffer (179 GPa vs 75 GPa). On the shop floor, Monel R-405 machines more easily (fair vs not recommended), Nitinol welds better (fair vs poor), and Nitinol sits in a lower cost tier (premium, $$$) than Monel R-405 (high, $$$$).
Monel R-405Choose it when strength drives the design, or when the part sees heat.
NitinolChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
Monel R-405 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Compressive Strength
Fracture Toughness (K_IC)
Hardness, Rockwell C
Hardness, Vickers
Physical
Density and transition temperatures.
Density
Liquidus Temperature
Same in both: Melting Point (Solidus) 1,300°C2,372 °F
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
Castability
Brazeability / Solderability
Polishability
Same in both: Formability (cold) 45 / 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 R-405 | Nitinol |
|---|---|---|
| CNC machining | — | Yes |
| Sheet metal | — | Yes |
| Default condition | — | O |
| 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.
Monel R-405 vs Nitinol — frequently asked
Is Monel R-405 stronger than Nitinol?
Yes. Monel R-405 has a typical yield strength of 450 MPa (65.3 ksi) against 400 MPa (58 ksi) for Nitinol — about 13% more. Tensile strength is 620 MPa (89.9 ksi) vs 950 MPa (138 ksi).
Which is cheaper, Monel R-405 or Nitinol?
Nitinol is the lower-cost material: it sits in the premium tier ($$$) while Monel R-405 is high ($$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Monel R-405 or Nitinol?
Monel R-405. Its machinability rates fair (50/100) against not recommended (12/100) for Nitinol; for welding the order is Nitinol first (fair, 35/100) then Monel R-405 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Monel R-405 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.