Nickel Alloy Alloy 890 vs CY-40
Nickel Alloy · grade comparison
Nickel Alloy Alloy 890 and CY-40 are both nickel alloy grades. CY-40 is the stronger of the two: yield strength 245 MPa (35.5 ksi) against 200 MPa (29 ksi) for Alloy 890, about 23% more; tensile strength follows at 520 MPa (75.4 ksi) vs 455 MPa (66 ksi). Alloy 890 is harder — 160 HB against 145 HB for CY-40 — which matters for wear surfaces and threads. Alloy 890 is lighter (7.95 g/cm³ vs 8.45 g/cm³ for CY-40) and CY-40 runs hotter in service (1,000°C vs 480°C continuous). On the shop floor, CY-40 welds better (good vs fair).
Alloy 890Choose it when surface hardness matters, or when weight is the constraint.
CY-40Choose it when strength drives the design, or when the part sees heat.
Alloy 890 vs CY-40: 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, 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)
Same in both: Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 1.7 % IACS
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) 20 / 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 | Alloy 890 | CY-40 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 3 finishes: Gold Plating, Plasma Spray, Silver Plating.
Alloy 890 vs CY-40 — frequently asked
Is CY-40 stronger than Alloy 890?
Yes. CY-40 has a typical yield strength of 245 MPa (35.5 ksi) against 200 MPa (29 ksi) for Alloy 890 — about 23% more. Tensile strength is 520 MPa (75.4 ksi) vs 455 MPa (66 ksi).
Which is cheaper, Alloy 890 or CY-40?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, Alloy 890 or CY-40?
CY-40. Its weldability rates good (60/100) against fair (45/100) for Alloy 890.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 890 and CY-40 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.