Nickel Alloy ERNiCrFe-7-AW vs ERNiCrFe-7 PWHT
Nickel Alloy · ERNiCrFe-7 temper comparison
ERNiCrFe-7-AW and ERNiCrFe-7 PWHT are two conditions of the same nickel alloy grade, ERNiCrFe-7: AW (as-welded deposit) versus PWHT (post-weld heat treated). The chemistry is identical, so every difference below comes from the condition. ERNiCrFe-7-AW is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 390 MPa (56.6 ksi) for ERNiCrFe-7 PWHT, about 6% more. ERNiCrFe-7-AW is harder — 185 HB against 175 HB for ERNiCrFe-7 PWHT — which matters for wear surfaces and threads.
ERNiCrFe-7-AWChoose it when strength drives the design, or when surface hardness matters.
ERNiCrFe-7-AW vs ERNiCrFe-7 PWHT: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 207 GPa30 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 168 GPa24.4 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,360°C2,480 °F · Liquidus Temperature 1,400°C2,552 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 12 W/m·K6.9 BTU/hr·ft·°F · Specific Heat Capacity 450 J/kg·K0.11 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) 950°C1,742 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.5 % IACS · Electrical Resistivity 1.15×10⁻⁶ Ω·m45.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V · Corrosion Resistance 88 / 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 78 / 100 · Brazeability / Solderability 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 155 MJ/kg66,638 BTU/lb · Embodied Carbon (primary production) 13 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.
ERNiCrFe-7-AW vs ERNiCrFe-7 PWHT — frequently asked
Is ERNiCrFe-7-AW stronger than ERNiCrFe-7 PWHT?
Yes. ERNiCrFe-7-AW has a typical yield strength of 415 MPa (60.2 ksi) against 390 MPa (56.6 ksi) for ERNiCrFe-7 PWHT — about 6% more. Tensile strength is 655 MPa (95 ksi) vs 630 MPa (91.4 ksi).
Which condition does FabDigit quote by default, AW or PWHT?
AW is the default ERNiCrFe-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 ERNiCrFe-7-AW over ERNiCrFe-7 PWHT?
Pick ERNiCrFe-7-AW when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ERNiCrFe-7-AW and ERNiCrFe-7 PWHT 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.