Nickel Alloy Nimonic 80A CD+A vs Nimonic 80A-ST
Nickel Alloy · Nimonic 80A temper comparison
Nimonic 80A CD+A and Nimonic 80A-ST are two conditions of the same nickel alloy grade, Nimonic 80A: CD+A (cold drawn bar/wire, then aged 700 °C/16 h) versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. Nimonic 80A CD+A is the stronger of the two: yield strength 900 MPa (131 ksi) against 320 MPa (46.4 ksi) for Nimonic 80A-ST, about 181% more; tensile strength follows at 1,230 MPa (178 ksi) vs 800 MPa (116 ksi). In exchange, Nimonic 80A-ST is the more ductile: elongation 45% versus 15% for Nimonic 80A CD+A, and Nimonic 80A CD+A is harder (355 HB vs 185 HB). On the shop floor, Nimonic 80A-ST machines more easily (poor vs not recommended) and Nimonic 80A-ST welds better (fair vs poor).
Nimonic 80A CD+AChoose it when strength drives the design.
Nimonic 80A-STChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Nimonic 80A CD+A vs Nimonic 80A-ST: 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.
Nimonic 80A CD+ANimonic 80A-ST
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)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 222 GPa32.2 Msi · Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 180 GPa26.1 Msi · Poisson's Ratio 0.31 · Shear Strength 680 MPa98.6 ksi · Fracture Toughness (K_IC) 95 MPa·√m86.5 ksi·√in · Charpy V-Notch Impact (RT) 40 J29.5 ft·lbf · Hardness, Vickers 325 HV
Physical
Density and transition temperatures.
Same in both: Density 8.19 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,360°C2,480 °F · Liquidus Temperature 1,390°C2,534 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 11.2 W/m·K6.5 BTU/hr·ft·°F · Specific Heat Capacity 448 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.7 µm/m·K7.1 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Max Service Temperature (continuous) 700°C1,292 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.4 % IACS · Electrical Resistivity 1.24×10⁻⁶ Ω·m48.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.13 V · Corrosion Resistance 75 / 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: Brazeability / Solderability 45 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 200 MJ/kg85,985 BTU/lb · Embodied Carbon (primary production) 13.5 kg CO₂/kg · Embodied Water 1,400 L/kg168 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.
Nimonic 80A CD+A vs Nimonic 80A-ST — frequently asked
Is Nimonic 80A CD+A stronger than Nimonic 80A-ST?
Yes. Nimonic 80A CD+A has a typical yield strength of 900 MPa (131 ksi) against 320 MPa (46.4 ksi) for Nimonic 80A-ST — about 181% more. Tensile strength is 1,230 MPa (178 ksi) vs 800 MPa (116 ksi).
Which condition does FabDigit quote by default, CD+A or ST?
STA is the default Nimonic 80A condition in the FabDigit quote flow (neither CD+A nor ST). 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, Nimonic 80A CD+A or Nimonic 80A-ST?
Nimonic 80A-ST. Its machinability rates poor (22/100) against not recommended (12/100) for Nimonic 80A CD+A; for welding the order is Nimonic 80A-ST first (fair, 45/100) then Nimonic 80A CD+A (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Nimonic 80A CD+A and Nimonic 80A-ST 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.