Nickel Alloy 718 Cast vs 718-CD
Nickel Alloy · 718 temper comparison
718 Cast and 718-CD are two conditions of the same nickel alloy grade, 718: Cast (as cast) versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. 718-CD is the stronger of the two: yield strength 930 MPa (135 ksi) against 880 MPa (128 ksi) for 718 Cast, about 6% more; tensile strength follows at 1,140 MPa (165 ksi) vs 1,030 MPa (149 ksi). 718-CD is the more ductile: elongation 18% versus 9% for 718 Cast, and 718 Cast is harder (330 HB vs 310 HB). 718 Cast runs hotter in service (650°C vs 540°C continuous).
718 CastChoose it when the part sees heat.
718-CDChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
718 Cast vs 718-CD: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 162 GPa23.5 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.19 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °F · Liquidus Temperature 1,336°C2,437 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 435 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13 µm/m·K7.2 µin/in·°F · Latent Heat of Fusion 210 J/g90.3 BTU/lb · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 78 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 45 / 100 · Brazeability / Solderability 55 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 175 MJ/kg75,237 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 400 L/kg47.9 gal/lb · Typical Recycled Content 40%
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.
718 Cast vs 718-CD — frequently asked
Is 718-CD stronger than 718 Cast?
Yes. 718-CD has a typical yield strength of 930 MPa (135 ksi) against 880 MPa (128 ksi) for 718 Cast — about 6% more. Tensile strength is 1,140 MPa (165 ksi) vs 1,030 MPa (149 ksi).
Which condition does FabDigit quote by default, Cast or CD?
STA is the default 718 condition in the FabDigit quote flow (neither Cast nor CD). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which welds better, 718 Cast or 718-CD?
718-CD. Its weldability rates very good (72/100) against good (65/100) for 718 Cast.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 718 Cast and 718-CD 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.