Steel X10Ni9-HR vs X10Ni9-NNT
Steel · X10Ni9 temper comparison
X10Ni9-HR and X10Ni9-NNT are two conditions of the same steel grade, X10Ni9: HR (hot rolled) versus NNT. The chemistry is identical, so every difference below comes from the condition. X10Ni9-HR is the stronger of the two: tensile strength 780 MPa (113 ksi) against 720 MPa (104 ksi) for X10Ni9-NNT, about 8% more. In exchange, X10Ni9-NNT is the more ductile: elongation 26% versus 20% for X10Ni9-HR, and X10Ni9-HR is harder (235 HB vs 210 HB).
X10Ni9-HRChoose it when strength drives the design.
X10Ni9-NNTChoose it when the part is bent, formed or impact-loaded.
X10Ni9-HR vs X10Ni9-NNT: 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
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 190 GPa27.6 Msi · Shear Modulus 74 GPa10.7 Msi · Bulk Modulus 160 GPa23.2 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) 1,430°C2,606 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Min Service Temperature
Same in both: Thermal Conductivity 30 W/m·K17.3 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.2 µm/m·K5.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 350°C662 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 5 % IACS · Electrical Resistivity 3.5×10⁻⁷ Ω·m13.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 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 40 / 100 · Brazeability / Solderability 45 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 40 MJ/kg17,197 BTU/lb · Embodied Carbon (primary production) 3 kg CO₂/kg · Embodied Water 70 L/kg8.4 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.
X10Ni9-HR vs X10Ni9-NNT — frequently asked
Is X10Ni9-HR stronger than X10Ni9-NNT?
Yes. X10Ni9-HR has a typical tensile strength of 780 MPa (113 ksi) against 720 MPa (104 ksi) for X10Ni9-NNT — about 8% more.
Which condition does FabDigit quote by default, HR or NNT?
QT is the default X10Ni9 condition in the FabDigit quote flow (neither HR nor NNT). 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, X10Ni9-HR or X10Ni9-NNT?
X10Ni9-NNT, by a small margin. Both rate fair for machinability — 45/100 against 38/100 for X10Ni9-HR; for welding the order is X10Ni9-NNT first (good, 60/100) then X10Ni9-HR (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in X10Ni9-HR and X10Ni9-NNT 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.