Steel ER90S-D2-AW vs ER90S-D2 PWHT
Steel · ER90S-D2 temper comparison
ER90S-D2-AW and ER90S-D2 PWHT are two conditions of the same steel grade, ER90S-D2: AW (as-welded deposit) versus PWHT (post-weld heat treated). The chemistry is identical, so every difference below comes from the condition. ER90S-D2-AW is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 500 MPa (72.5 ksi) for ER90S-D2 PWHT, about 14% more; tensile strength follows at 660 MPa (95.7 ksi) vs 600 MPa (87 ksi). In exchange, ER90S-D2 PWHT is the more ductile: elongation 26% versus 23% for ER90S-D2-AW, and ER90S-D2-AW is harder (210 HB vs 185 HB). On the shop floor, ER90S-D2 PWHT machines more easily (good vs fair).
ER90S-D2-AWChoose it when strength drives the design.
ER90S-D2 PWHTChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
ER90S-D2-AW vs ER90S-D2 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Rockwell C
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
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,470°C2,678 °F · Liquidus Temperature 1,520°C2,768 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.5 µm/m·K6.9 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -40°C-40 °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) -0.65 V · Corrosion Resistance 12 / 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 90 / 100 · Brazeability / Solderability 60 / 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 45 L/kg5.4 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.
ER90S-D2-AW vs ER90S-D2 PWHT — frequently asked
Is ER90S-D2-AW stronger than ER90S-D2 PWHT?
Yes. ER90S-D2-AW has a typical yield strength of 570 MPa (82.7 ksi) against 500 MPa (72.5 ksi) for ER90S-D2 PWHT — about 14% more. Tensile strength is 660 MPa (95.7 ksi) vs 600 MPa (87 ksi).
Which condition does FabDigit quote by default, AW or PWHT?
AW is the default ER90S-D2 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, ER90S-D2-AW or ER90S-D2 PWHT?
ER90S-D2 PWHT. Its machinability rates good (55/100) against fair (45/100) for ER90S-D2-AW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER90S-D2-AW and ER90S-D2 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.