Nickel Alloy 718-ANN vs 718 Cast
Nickel Alloy · 718 temper comparison
718-ANN and 718 Cast are two conditions of the same nickel alloy grade, 718: ANN (annealed) versus Cast (as cast). The chemistry is identical, so every difference below comes from the condition. 718 Cast is the stronger of the two: yield strength 880 MPa (128 ksi) against 500 MPa (72.5 ksi) for 718-ANN, about 76% more; tensile strength follows at 1,030 MPa (149 ksi) vs 965 MPa (140 ksi). In exchange, 718-ANN is the more ductile: elongation 45% versus 9% for 718 Cast, and 718 Cast is harder (330 HB vs 200 HB). 718 Cast runs hotter in service (650°C vs 550°C continuous). On the shop floor, 718-ANN welds better (very good vs good).
718-ANNChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
718 CastChoose it when strength drives the design, or when the part sees heat.
718-ANN vs 718 Cast: 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
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 162 GPa23.5 Msi · Poisson's Ratio 0.29 · Compressive Strength 1,200 MPa174 ksi · Shear Strength 830 MPa120 ksi · Hardness, Vickers 410 HV
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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 11.4 W/m·K6.6 BTU/hr·ft·°F · 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.
Same in both: Electrical Conductivity 1.4 % IACS · Electrical Resistivity 1.25×10⁻⁶ Ω·m49.2 µΩ·in
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-ANN vs 718 Cast — frequently asked
Is 718 Cast stronger than 718-ANN?
Yes. 718 Cast has a typical yield strength of 880 MPa (128 ksi) against 500 MPa (72.5 ksi) for 718-ANN — about 76% more. Tensile strength is 1,030 MPa (149 ksi) vs 965 MPa (140 ksi).
Which condition does FabDigit quote by default, ANN or Cast?
STA is the default 718 condition in the FabDigit quote flow (neither ANN nor Cast). 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 is easier to machine, 718-ANN or 718 Cast?
718-ANN, by a small margin. Both rate poor for machinability — 22/100 against 17/100 for 718 Cast; for welding the order is 718-ANN first (very good, 80/100) then 718 Cast (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 718-ANN and 718 Cast 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.