Steel X10Ni9 FORGED-QT vs X10Ni9-HR
Steel · X10Ni9 temper comparison
X10Ni9 FORGED-QT and X10Ni9-HR are two conditions of the same steel grade, X10Ni9: FORGED-QT (forging +QT) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. X10Ni9 FORGED-QT is the stronger of the two: yield strength 610 MPa (88.5 ksi) against 560 MPa (81.2 ksi) for X10Ni9-HR, about 9% more. X10Ni9-HR is harder — 235 HB against 220 HB for X10Ni9 FORGED-QT — which matters for wear surfaces and threads.
X10Ni9 FORGED-QTChoose it when strength drives the design.
X10Ni9-HRChoose it when surface hardness matters.
X10Ni9 FORGED-QT vs X10Ni9-HR: 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 FORGED-QT vs X10Ni9-HR — frequently asked
Is X10Ni9 FORGED-QT stronger than X10Ni9-HR?
Yes. X10Ni9 FORGED-QT has a typical yield strength of 610 MPa (88.5 ksi) against 560 MPa (81.2 ksi) for X10Ni9-HR — about 9% more. Tensile strength is 720 MPa (104 ksi) vs 780 MPa (113 ksi).
Which condition does FabDigit quote by default, FORGED-QT or HR?
QT is the default X10Ni9 condition in the FabDigit quote flow (neither FORGED-QT nor HR). 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 X10Ni9 FORGED-QT over X10Ni9-HR?
Pick X10Ni9 FORGED-QT when strength drives the design. Pick X10Ni9-HR when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in X10Ni9 FORGED-QT and X10Ni9-HR 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.