Nickel Alloy Alloy 31 Annealed vs Alloy 31 AsWelded
Nickel Alloy · Alloy 31 temper comparison
Alloy 31 Annealed and Alloy 31 AsWelded are two conditions of the same nickel alloy grade, Alloy 31: Annealed versus AsWelded (as-welded deposit). The chemistry is identical, so every difference below comes from the condition. Alloy 31 AsWelded is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 340 MPa (49.3 ksi) for Alloy 31 Annealed, about 12% more. In exchange, Alloy 31 Annealed is the more ductile: elongation 50% versus 35% for Alloy 31 AsWelded, and Alloy 31 AsWelded is harder (200 HB vs 180 HB).
Alloy 31 AnnealedChoose it when the part is bent, formed or impact-loaded.
Alloy 31 AsWeldedChoose it when strength drives the design.
Alloy 31 Annealed vs Alloy 31 AsWelded: 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.
Alloy 31 AnnealedAlloy 31 AsWelded
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 195 GPa28.3 Msi · Shear Modulus 75 GPa10.9 Msi · Bulk Modulus 163 GPa23.6 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8.02 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,320°C2,408 °F · Liquidus Temperature 1,360°C2,480 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 11 W/m·K6.4 BTU/hr·ft·°F · Specific Heat Capacity 450 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.5 µm/m·K8.1 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.7 % IACS · Electrical Resistivity 1×10⁻⁶ Ω·m39.4 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 V
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 35 / 100 · Brazeability / Solderability 45 / 100 · Polishability 78 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 95 MJ/kg40,843 BTU/lb · Embodied Carbon (primary production) 7.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
Alloy 31 Annealed vs Alloy 31 AsWelded — frequently asked
Is Alloy 31 AsWelded stronger than Alloy 31 Annealed?
Yes. Alloy 31 AsWelded has a typical yield strength of 380 MPa (55.1 ksi) against 340 MPa (49.3 ksi) for Alloy 31 Annealed — about 12% more. Tensile strength is 680 MPa (98.6 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, Annealed or AsWelded?
Annealed is the default Alloy 31 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.
When should I choose Alloy 31 Annealed over Alloy 31 AsWelded?
Pick Alloy 31 Annealed when the part is bent, formed or impact-loaded. Pick Alloy 31 AsWelded when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Alloy 31 Annealed and Alloy 31 AsWelded 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.