Nickel Alloy 2.4878 +AT vs 2.4878 +F
Nickel Alloy · 2.4878 temper comparison
2.4878 +AT and 2.4878 +F are two conditions of the same nickel alloy grade, 2.4878: +AT (solution annealed) versus +F (as forged / hot rolled, unheat-treated stock). The chemistry is identical, so every difference below comes from the condition. 2.4878 +F is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 450 MPa (65.3 ksi) for 2.4878 +AT, about 24% more; tensile strength follows at 1,000 MPa (145 ksi) vs 900 MPa (131 ksi). In exchange, 2.4878 +AT is the more ductile: elongation 40% versus 30% for 2.4878 +F, and 2.4878 +F is harder (260 HB vs 220 HB).
2.4878 +ATChoose it when the part is bent, formed or impact-loaded.
2.4878 +FChoose it when strength drives the design.
2.4878 +AT vs 2.4878 +F: 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 82 GPa11.9 Msi · Bulk Modulus 175 GPa25.4 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.2 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,310°C2,390 °F · Liquidus Temperature 1,370°C2,498 °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) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 295 J/g127 BTU/lb · Min Service Temperature -196°C-321 °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 %)
Formability (cold)
Same in both: Weldability 45 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 150 MJ/kg64,488 BTU/lb · Embodied Carbon (primary production) 13 kg CO₂/kg · Embodied Water 400 L/kg47.9 gal/lb · Typical Recycled Content 30%
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.
2.4878 +AT vs 2.4878 +F — frequently asked
Is 2.4878 +F stronger than 2.4878 +AT?
Yes. 2.4878 +F has a typical yield strength of 560 MPa (81.2 ksi) against 450 MPa (65.3 ksi) for 2.4878 +AT — about 24% more. Tensile strength is 1,000 MPa (145 ksi) vs 900 MPa (131 ksi).
Which condition does FabDigit quote by default, +AT or +F?
+P1080 is the default 2.4878 condition in the FabDigit quote flow (neither +AT nor +F). 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.
When should I choose 2.4878 +AT over 2.4878 +F?
Pick 2.4878 +AT when the part is bent, formed or impact-loaded. Pick 2.4878 +F when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2.4878 +AT and 2.4878 +F 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.