Steel ER80S-Ni1-AW vs ER80S-Ni1 PWHT
Steel · ER80S-Ni1 temper comparison
ER80S-Ni1-AW and ER80S-Ni1 PWHT are two conditions of the same steel grade, ER80S-Ni1: AW (as-welded deposit) versus PWHT (post-weld heat treated). The chemistry is identical, so every difference below comes from the condition. ER80S-Ni1-AW is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 480 MPa (69.6 ksi) for ER80S-Ni1 PWHT, about 8% more; tensile strength follows at 610 MPa (88.5 ksi) vs 570 MPa (82.7 ksi). ER80S-Ni1-AW is harder — 190 HB against 170 HB for ER80S-Ni1 PWHT — which matters for wear surfaces and threads.
ER80S-Ni1-AWChoose it when strength drives the design, or when surface hardness matters.
ER80S-Ni1-AW vs ER80S-Ni1 PWHT: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel 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 steel 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Shear Strength 370 MPa53.7 ksi · Fracture Toughness (K_IC) 110 MPa·√m100 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,460°C2,660 °F · Liquidus Temperature 1,520°C2,768 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Thermal Conductivity 42 W/m·K24.3 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 14 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 58% · Weldability 92 / 100 · Formability (cold) 60 / 100 · Brazeability / Solderability 65 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
ER80S-Ni1-AW vs ER80S-Ni1 PWHT — frequently asked
Is ER80S-Ni1-AW stronger than ER80S-Ni1 PWHT?
Yes. ER80S-Ni1-AW has a typical yield strength of 520 MPa (75.4 ksi) against 480 MPa (69.6 ksi) for ER80S-Ni1 PWHT — about 8% more. Tensile strength is 610 MPa (88.5 ksi) vs 570 MPa (82.7 ksi).
Which condition does FabDigit quote by default, AW or PWHT?
AW is the default ER80S-Ni1 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.
Which is easier to machine, ER80S-Ni1-AW or ER80S-Ni1 PWHT?
ER80S-Ni1 PWHT, by a small margin. Both rate good for machinability — 60/100 against 55/100 for ER80S-Ni1-AW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER80S-Ni1-AW and ER80S-Ni1 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.