Steel W9Mo3Cr4V QT60-62 vs W9Mo3Cr4V QT65-66
Steel · W9Mo3Cr4V temper comparison
W9Mo3Cr4V QT60-62 and W9Mo3Cr4V QT65-66 are two conditions of the same steel grade, W9Mo3Cr4V: QT60-62 (hardened & tempered, 60–62 HRC) versus QT65-66 (hardened & tempered, 64–66 HRC). The chemistry is identical, so every difference below comes from the condition. W9Mo3Cr4V QT60-62 is the stronger of the two: tensile strength 2,000 MPa (290 ksi) against 850 MPa (123 ksi) for W9Mo3Cr4V QT65-66, about 135% more. In exchange, W9Mo3Cr4V QT65-66 is the more ductile: elongation 18% versus 1% for W9Mo3Cr4V QT60-62.
W9Mo3Cr4V QT60-62Choose it when strength drives the design.
W9Mo3Cr4V QT65-66Choose it when the part is bent, formed or impact-loaded.
W9Mo3Cr4V QT60-62 vs W9Mo3Cr4V QT65-66: 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.
W9Mo3Cr4V QT60-62W9Mo3Cr4V QT65-66
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Charpy V-Notch Impact (RT)
Same in both: Shear Modulus 85 GPa12.3 Msi · Bulk Modulus 170 GPa24.7 Msi · Poisson's Ratio 0.29 · Yield Strength (0.2% offset) 550 MPa79.8 ksi · Reduction in Area 35% · Hardness, Brinell 240 HB · Hardness, Rockwell B 100 HRB
Physical
Density and transition temperatures.
Same in both: Density 8.3 g/cm³0.3 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °F · Liquidus Temperature 1,430°C2,606 °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 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.7 µm/m·K5.9 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 5.5×10⁻⁷ Ω·m21.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.58 V · Corrosion Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 45% · Weldability 25 / 100 · Formability (cold) 15 / 100 · Castability 30 / 100 · Brazeability / Solderability 60 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 60 MJ/kg25,795 BTU/lb · Embodied Carbon (primary production) 4.2 kg CO₂/kg · Embodied Water 80 L/kg9.6 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.
W9Mo3Cr4V QT60-62 vs W9Mo3Cr4V QT65-66 — frequently asked
Is W9Mo3Cr4V QT60-62 stronger than W9Mo3Cr4V QT65-66?
Yes. W9Mo3Cr4V QT60-62 has a typical tensile strength of 2,000 MPa (290 ksi) against 850 MPa (123 ksi) for W9Mo3Cr4V QT65-66 — about 135% more.
Which condition does FabDigit quote by default, QT60-62 or QT65-66?
ANN is the default W9Mo3Cr4V condition in the FabDigit quote flow (neither QT60-62 nor QT65-66). 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 W9Mo3Cr4V QT60-62 over W9Mo3Cr4V QT65-66?
Pick W9Mo3Cr4V QT60-62 when strength drives the design. Pick W9Mo3Cr4V QT65-66 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in W9Mo3Cr4V QT60-62 and W9Mo3Cr4V QT65-66 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.