Steel ER80S-B8-AW vs ER80S-B8 PWHT
Steel · ER80S-B8 temper comparison
ER80S-B8-AW and ER80S-B8 PWHT are two conditions of the same steel grade, ER80S-B8: AW (as-welded deposit) versus PWHT (post-weld heat treated). The chemistry is identical, so every difference below comes from the condition. ER80S-B8-AW is the stronger of the two: yield strength 720 MPa (104 ksi) against 490 MPa (71.1 ksi) for ER80S-B8 PWHT, about 47% more; tensile strength follows at 950 MPa (138 ksi) vs 620 MPa (89.9 ksi). In exchange, ER80S-B8 PWHT is the more ductile: elongation 22% versus 12% for ER80S-B8-AW, and ER80S-B8-AW is harder (375 HB vs 200 HB). ER80S-B8 PWHT runs hotter in service (600°C vs 450°C continuous). On the shop floor, ER80S-B8 PWHT machines more easily (fair vs poor).
ER80S-B8-AWChoose it when strength drives the design.
ER80S-B8 PWHTChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
ER80S-B8-AW vs ER80S-B8 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Shear Strength 390 MPa56.6 ksi
Physical
Density and transition temperatures.
Same in both: Density 7.75 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 28 W/m·K16.2 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.5 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3 % IACS · Electrical Resistivity 5.7×10⁻⁷ Ω·m22.4 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 55 / 100 · Formability (cold) 45 / 100 · Brazeability / Solderability 55 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 35%
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-B8-AW vs ER80S-B8 PWHT — frequently asked
Is ER80S-B8-AW stronger than ER80S-B8 PWHT?
Yes. ER80S-B8-AW has a typical yield strength of 720 MPa (104 ksi) against 490 MPa (71.1 ksi) for ER80S-B8 PWHT — about 47% more. Tensile strength is 950 MPa (138 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, AW or PWHT?
PWHT is the default ER80S-B8 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-B8-AW or ER80S-B8 PWHT?
ER80S-B8 PWHT. Its machinability rates fair (38/100) against poor (18/100) for ER80S-B8-AW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ER80S-B8-AW and ER80S-B8 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.