Steel 36NiCrMo16 +A vs 36NiCrMo16 +QT+Nitrided
Steel · 36NiCrMo16 temper comparison
36NiCrMo16 +A and 36NiCrMo16 +QT+Nitrided are two conditions of the same steel grade, 36NiCrMo16: +A (annealed) versus +QT+Nitrided (+QT then gas/plasma nitrided). The chemistry is identical, so every difference below comes from the condition. 36NiCrMo16 +QT+Nitrided is the stronger of the two: yield strength 1,050 MPa (152 ksi) against 520 MPa (75.4 ksi) for 36NiCrMo16 +A, about 102% more; tensile strength follows at 1,250 MPa (181 ksi) vs 800 MPa (116 ksi). In exchange, 36NiCrMo16 +A is the more ductile: elongation 16% versus 11% for 36NiCrMo16 +QT+Nitrided, and 36NiCrMo16 +QT+Nitrided is harder (380 HB vs 235 HB). 36NiCrMo16 +QT+Nitrided runs hotter in service (450°C vs 350°C continuous). On the shop floor, 36NiCrMo16 +A machines more easily (fair vs not recommended) and 36NiCrMo16 +A welds better (poor vs not recommended).
36NiCrMo16 +AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
36NiCrMo16 +QT+NitridedChoose it when strength drives the design, or when the part sees heat.
36NiCrMo16 +A vs 36NiCrMo16 +QT+Nitrided: 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.
36NiCrMo16 +A36NiCrMo16 +QT+Nitrided
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
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Reduction in Area 45%
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 34 W/m·K19.6 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.8 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -80°C-112 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 5.7 % IACS · Electrical Resistivity 3×10⁻⁷ Ω·m11.8 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: Castability 30 / 100 · Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.5 kg CO₂/kg · Embodied Water 60 L/kg7.2 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.
36NiCrMo16 +A vs 36NiCrMo16 +QT+Nitrided — frequently asked
Is 36NiCrMo16 +QT+Nitrided stronger than 36NiCrMo16 +A?
Yes. 36NiCrMo16 +QT+Nitrided has a typical yield strength of 1,050 MPa (152 ksi) against 520 MPa (75.4 ksi) for 36NiCrMo16 +A — about 102% more. Tensile strength is 1,250 MPa (181 ksi) vs 800 MPa (116 ksi).
Which condition does FabDigit quote by default, +A or +QT+Nitrided?
+QT-40 is the default 36NiCrMo16 condition in the FabDigit quote flow (neither +A nor +QT+Nitrided). 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, 36NiCrMo16 +A or 36NiCrMo16 +QT+Nitrided?
36NiCrMo16 +A. Its machinability rates fair (48/100) against not recommended (8/100) for 36NiCrMo16 +QT+Nitrided; for welding the order is 36NiCrMo16 +A first (poor, 25/100) then 36NiCrMo16 +QT+Nitrided (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 36NiCrMo16 +A and 36NiCrMo16 +QT+Nitrided 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.