Nickel Alloy 718Plus-AN vs 718Plus-STA
Nickel Alloy · 718Plus temper comparison
718Plus-AN and 718Plus-STA are two conditions of the same nickel alloy grade, 718Plus: AN (solution annealed) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. 718Plus-STA is the stronger of the two: yield strength 1,220 MPa (177 ksi) against 500 MPa (72.5 ksi) for 718Plus-AN, about 144% more; tensile strength follows at 1,480 MPa (215 ksi) vs 950 MPa (138 ksi). In exchange, 718Plus-AN is the more ductile: elongation 50% versus 17% for 718Plus-STA, and 718Plus-STA is harder (44 HRC vs 22 HRC). On the shop floor, 718Plus-AN welds better (very good vs good).
718Plus-ANChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
718Plus-STAChoose it when strength drives the design.
718Plus-AN vs 718Plus-STA: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 197 GPa28.6 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 158 GPa22.9 Msi · Poisson's Ratio 0.29 · Compressive Strength 1,250 MPa181 ksi · Shear Strength 900 MPa131 ksi · Fracture Toughness (K_IC) 100 MPa·√m91 ksi·√in · Hardness, Brinell 415 HB
Physical
Density and transition temperatures.
Same in both: Density 8.22 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °F · Liquidus Temperature 1,345°C2,453 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 10.9 W/m·K6.3 BTU/hr·ft·°F · Specific Heat Capacity 435 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.8 µm/m·K7.1 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.4 % IACS · Electrical Resistivity 1.22×10⁻⁶ Ω·m48 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 72 / 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 25 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 215 MJ/kg92,433 BTU/lb · Embodied Carbon (primary production) 14.5 kg CO₂/kg · Embodied Water 350 L/kg41.9 gal/lb · Typical Recycled Content 35%
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.
718Plus-AN vs 718Plus-STA — frequently asked
Is 718Plus-STA stronger than 718Plus-AN?
Yes. 718Plus-STA has a typical yield strength of 1,220 MPa (177 ksi) against 500 MPa (72.5 ksi) for 718Plus-AN — about 144% more. Tensile strength is 1,480 MPa (215 ksi) vs 950 MPa (138 ksi).
Which condition does FabDigit quote by default, AN or STA?
STA is the default 718Plus condition in the FabDigit quote flow. 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, 718Plus-AN or 718Plus-STA?
718Plus-AN. Its machinability rates poor (20/100) against not recommended (12/100) for 718Plus-STA; for welding the order is 718Plus-AN first (very good, 75/100) then 718Plus-STA (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 718Plus-AN and 718Plus-STA 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.