Steel 15MnMoV4-5 +N vs 15MnMoV4-5 +QT
Steel · 15MnMoV4-5 temper comparison
15MnMoV4-5 +N and 15MnMoV4-5 +QT are two conditions of the same steel grade, 15MnMoV4-5: +N (normalized) versus +QT (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. 15MnMoV4-5 +QT is the stronger of the two: yield strength 550 MPa (79.8 ksi) against 430 MPa (62.4 ksi) for 15MnMoV4-5 +N, about 28% more; tensile strength follows at 720 MPa (104 ksi) vs 610 MPa (88.5 ksi). In exchange, 15MnMoV4-5 +N is the more ductile: elongation 22% versus 18% for 15MnMoV4-5 +QT, and 15MnMoV4-5 +QT is harder (225 HB vs 185 HB).
15MnMoV4-5 +NChoose it when the part is bent, formed or impact-loaded.
15MnMoV4-5 +QTChoose it when strength drives the design.
15MnMoV4-5 +N vs 15MnMoV4-5 +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
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
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 166 GPa24.1 Msi · Poisson's Ratio 0.29 · Reduction in Area 58% · Compressive Strength 460 MPa66.7 ksi · Shear Strength 400 MPa58 ksi · Hardness, Rockwell B 92 HRB · Hardness, Vickers 205 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,460°C2,660 °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 40 W/m·K23.1 BTU/hr·ft·°F · Specific Heat Capacity 465 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 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 7.5 % IACS · Electrical Resistivity 2.3×10⁻⁷ Ω·m9.06 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 12 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Weldability
Same in both: Machinability 55 / 100 · Formability (cold) 50 / 100 · Castability 40 / 100 · Brazeability / Solderability 55 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 31 MJ/kg13,328 BTU/lb · Embodied Carbon (primary production) 2.2 kg CO₂/kg · Embodied Water 55 L/kg6.6 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.
15MnMoV4-5 +N vs 15MnMoV4-5 +QT — frequently asked
Is 15MnMoV4-5 +QT stronger than 15MnMoV4-5 +N?
Yes. 15MnMoV4-5 +QT has a typical yield strength of 550 MPa (79.8 ksi) against 430 MPa (62.4 ksi) for 15MnMoV4-5 +N — about 28% more. Tensile strength is 720 MPa (104 ksi) vs 610 MPa (88.5 ksi).
Which condition does FabDigit quote by default, +N or +QT?
+NT is the default 15MnMoV4-5 condition in the FabDigit quote flow (neither +N nor +QT). 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 welds better, 15MnMoV4-5 +N or 15MnMoV4-5 +QT?
15MnMoV4-5 +N. Its weldability rates good (58/100) against fair (50/100) for 15MnMoV4-5 +QT.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 15MnMoV4-5 +N and 15MnMoV4-5 +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.