Nickel Alloy ENiCu-7-AW vs ENiCu-7-SR
Nickel Alloy · ENiCu-7 temper comparison
ENiCu-7-AW and ENiCu-7-SR are two conditions of the same nickel alloy grade, ENiCu-7: AW (as-welded deposit) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. ENiCu-7-AW is the stronger of the two: yield strength 290 MPa (42.1 ksi) against 250 MPa (36.3 ksi) for ENiCu-7-SR, about 16% more. In exchange, ENiCu-7-SR is the more ductile: elongation 40% versus 35% for ENiCu-7-AW, and ENiCu-7-AW is harder (165 HB vs 150 HB).
ENiCu-7-AWChoose it when strength drives the design.
ENiCu-7-SRChoose it when the part is bent, formed or impact-loaded.
ENiCu-7-AW vs ENiCu-7-SR: 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
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 179 GPa26 Msi · Shear Modulus 66 GPa9.6 Msi · Bulk Modulus 148 GPa21.5 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 8.83 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,300°C2,372 °F · Liquidus Temperature 1,345°C2,453 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 427 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13.9 µm/m·K7.7 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Max Service Temperature (continuous) 480°C896 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.17 V
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 72 / 100 · Brazeability / Solderability 60 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 125 MJ/kg53,740 BTU/lb · Embodied Carbon (primary production) 10.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
ENiCu-7-AW vs ENiCu-7-SR — frequently asked
Is ENiCu-7-AW stronger than ENiCu-7-SR?
Yes. ENiCu-7-AW has a typical yield strength of 290 MPa (42.1 ksi) against 250 MPa (36.3 ksi) for ENiCu-7-SR — about 16% more. Tensile strength is 520 MPa (75.4 ksi) vs 500 MPa (72.5 ksi).
Which condition does FabDigit quote by default, AW or SR?
AW is the default ENiCu-7 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 ENiCu-7-AW over ENiCu-7-SR?
Pick ENiCu-7-AW when strength drives the design. Pick ENiCu-7-SR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ENiCu-7-AW and ENiCu-7-SR 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.