Nickel Alloy N09777-SA vs N09777-STA
Nickel Alloy · N09777 temper comparison
N09777-SA and N09777-STA are two conditions of the same nickel alloy grade, N09777: SA (solution annealed) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. N09777-STA is the stronger of the two: yield strength 1,000 MPa (145 ksi) against 480 MPa (69.6 ksi) for N09777-SA, about 108% more; tensile strength follows at 1,275 MPa (185 ksi) vs 830 MPa (120 ksi). In exchange, N09777-SA is the more ductile: elongation 35% versus 15% for N09777-STA. N09777-STA runs hotter in service (650°C vs 540°C continuous). On the shop floor, N09777-SA machines more easily (32 vs 22 out of 100) and N09777-SA welds better (very good vs fair).
N09777-SAChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
N09777-STAChoose it when strength drives the design, or when the part sees heat.
N09777-SA vs N09777-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)
Same in both: Elastic (Young's) Modulus 160 GPa23.2 Msi · Shear Modulus 62 GPa9 Msi · Bulk Modulus 127 GPa18.4 Msi · Poisson's Ratio 0.29 · Shear Strength 760 MPa110 ksi · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in · Hardness, Rockwell C 40 HRC · Hardness, Vickers 400 HV
Physical
Density and transition temperatures.
Same in both: Density 8.14 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,345°C2,453 °F · Liquidus Temperature 1,425°C2,597 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 13 W/m·K7.5 BTU/hr·ft·°F · Specific Heat Capacity 435 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 7.4 µm/m·K4.1 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.8 % IACS · Electrical Resistivity 9.8×10⁻⁷ Ω·m38.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.35 V · Corrosion Resistance 40 / 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 30 / 100 · Brazeability / Solderability 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 230 MJ/kg98,882 BTU/lb · Embodied Carbon (primary production) 17 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 25%
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.
N09777-SA vs N09777-STA — frequently asked
Is N09777-STA stronger than N09777-SA?
Yes. N09777-STA has a typical yield strength of 1,000 MPa (145 ksi) against 480 MPa (69.6 ksi) for N09777-SA — about 108% more. Tensile strength is 1,275 MPa (185 ksi) vs 830 MPa (120 ksi).
Which condition does FabDigit quote by default, SA or STA?
STA is the default N09777 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, N09777-SA or N09777-STA?
N09777-SA, by a small margin. Both rate poor for machinability — 32/100 against 22/100 for N09777-STA; for welding the order is N09777-SA first (very good, 70/100) then N09777-STA (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in N09777-SA and N09777-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.