Steel 12CrMoV N+T vs 12CrMoV-QT
Steel · 12CrMoV temper comparison
12CrMoV N+T and 12CrMoV-QT are two conditions of the same steel grade, 12CrMoV: N+T (normalized and tempered) versus QT (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. 12CrMoV-QT is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 300 MPa (43.5 ksi) for 12CrMoV N+T, about 83% more; tensile strength follows at 700 MPa (102 ksi) vs 540 MPa (78.3 ksi). In exchange, 12CrMoV N+T is the more ductile: elongation 25% versus 18% for 12CrMoV-QT, and 12CrMoV-QT is harder (217 HB vs 155 HB). On the shop floor, 12CrMoV N+T machines more easily (good vs fair) and 12CrMoV N+T welds better (good vs fair).
12CrMoV N+TChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
12CrMoV-QTChoose it when strength drives the design.
12CrMoV N+T vs 12CrMoV-QT: 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
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 · Compressive Strength 300 MPa43.5 ksi · Shear Strength 350 MPa50.8 ksi · Fracture Toughness (K_IC) 120 MPa·√m109 ksi·√in · Hardness, Rockwell B 82 HRB · Hardness, Vickers 163 HV
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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 41 W/m·K23.7 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 · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 16 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Same in both: Formability (cold) 55 / 100 · Brazeability / Solderability 50 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 27 MJ/kg11,608 BTU/lb · Embodied Carbon (primary production) 2.1 kg CO₂/kg · Embodied Water 55 L/kg6.6 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.
12CrMoV N+T vs 12CrMoV-QT — frequently asked
Is 12CrMoV-QT stronger than 12CrMoV N+T?
Yes. 12CrMoV-QT has a typical yield strength of 550 MPa (79.8 ksi) against 300 MPa (43.5 ksi) for 12CrMoV N+T — about 83% more. Tensile strength is 700 MPa (102 ksi) vs 540 MPa (78.3 ksi).
Which condition does FabDigit quote by default, N+T or QT?
N+T is the default 12CrMoV 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, 12CrMoV N+T or 12CrMoV-QT?
12CrMoV N+T. Its machinability rates good (58/100) against fair (48/100) for 12CrMoV-QT; for welding the order is 12CrMoV N+T first (good, 60/100) then 12CrMoV-QT (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 12CrMoV N+T and 12CrMoV-QT 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.