Steel A182 F3VCb-QT vs A182 F3VCb QT-SPWHT
Steel · A182 F3VCb temper comparison
A182 F3VCb-QT and A182 F3VCb QT-SPWHT are two conditions of the same steel grade, A182 F3VCb: QT (quenched and tempered) versus QT-SPWHT (Q&T + simulated PWHT). The chemistry is identical, so every difference below comes from the condition. A182 F3VCb-QT is the stronger of the two: yield strength 515 MPa (74.7 ksi) against 480 MPa (69.6 ksi) for A182 F3VCb QT-SPWHT, about 7% more; tensile strength follows at 655 MPa (95 ksi) vs 620 MPa (89.9 ksi). A182 F3VCb-QT is harder — 200 HB against 190 HB for A182 F3VCb QT-SPWHT — which matters for wear surfaces and threads.
A182 F3VCb-QTChoose it when strength drives the design, or when surface hardness matters.
A182 F3VCb-QT vs A182 F3VCb QT-SPWHT: 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.
A182 F3VCb-QTA182 F3VCb QT-SPWHT
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
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 · Reduction in Area 65%
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,450°C2,642 °F · Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 35 W/m·K20.2 BTU/hr·ft·°F · Specific Heat Capacity 460 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 270 J/g116 BTU/lb · Max Service Temperature (continuous) 540°C1,004 °F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 25 / 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 45 / 100 · Castability 40 / 100 · Brazeability / Solderability 40 / 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) 2.3 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 25%
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.
A182 F3VCb-QT vs A182 F3VCb QT-SPWHT — frequently asked
Is A182 F3VCb-QT stronger than A182 F3VCb QT-SPWHT?
Yes. A182 F3VCb-QT has a typical yield strength of 515 MPa (74.7 ksi) against 480 MPa (69.6 ksi) for A182 F3VCb QT-SPWHT — about 7% more. Tensile strength is 655 MPa (95 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, QT or QT-SPWHT?
QT is the default A182 F3VCb 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 A182 F3VCb-QT over A182 F3VCb QT-SPWHT?
Pick A182 F3VCb-QT when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A182 F3VCb-QT and A182 F3VCb QT-SPWHT 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.