Steel 7CrWVMoNb9-6-AW vs 7CrWVMoNb9-6 Q+T
Steel · 7CrWVMoNb9-6 temper comparison
7CrWVMoNb9-6-AW and 7CrWVMoNb9-6 Q+T are two conditions of the same steel grade, 7CrWVMoNb9-6: AW (as-welded deposit) versus Q+T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. 7CrWVMoNb9-6 Q+T is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 480 MPa (69.6 ksi) for 7CrWVMoNb9-6-AW, about 8% more. 7CrWVMoNb9-6 Q+T is the more ductile: elongation 21% versus 18% for 7CrWVMoNb9-6-AW, and 7CrWVMoNb9-6-AW is harder (285 HB vs 210 HB). On the shop floor, 7CrWVMoNb9-6 Q+T machines more easily (45 vs 35 out of 100).
7CrWVMoNb9-6 Q+TChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
7CrWVMoNb9-6-AW vs 7CrWVMoNb9-6 Q+T: 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.
7CrWVMoNb9-6-AW7CrWVMoNb9-6 Q+T
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 213 GPa30.9 Msi · Shear Modulus 82 GPa11.9 Msi · Bulk Modulus 165 GPa23.9 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) 1,465°C2,669 °F · Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 29 W/m·K16.8 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 250 J/g107 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 2.4×10⁻⁷ Ω·m9.45 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: 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.
7CrWVMoNb9-6-AW vs 7CrWVMoNb9-6 Q+T — frequently asked
Is 7CrWVMoNb9-6 Q+T stronger than 7CrWVMoNb9-6-AW?
Yes. 7CrWVMoNb9-6 Q+T has a typical yield strength of 520 MPa (75.4 ksi) against 480 MPa (69.6 ksi) for 7CrWVMoNb9-6-AW — about 8% more. Tensile strength is 650 MPa (94.3 ksi) vs 620 MPa (89.9 ksi).
Which condition does FabDigit quote by default, AW or Q+T?
N+T is the default 7CrWVMoNb9-6 condition in the FabDigit quote flow (neither AW nor Q+T). 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, 7CrWVMoNb9-6-AW or 7CrWVMoNb9-6 Q+T?
7CrWVMoNb9-6 Q+T, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for 7CrWVMoNb9-6-AW; for welding the order is 7CrWVMoNb9-6 Q+T first (good, 58/100) then 7CrWVMoNb9-6-AW (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 7CrWVMoNb9-6-AW and 7CrWVMoNb9-6 Q+T 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.