Steel G9Ni14-QT vs G9Ni14 QT-HS
Steel · G9Ni14 temper comparison
G9Ni14-QT and G9Ni14 QT-HS are two conditions of the same steel grade, G9Ni14: QT (quenched and tempered) versus QT-HS (QT heavy section). The chemistry is identical, so every difference below comes from the condition. G9Ni14-QT is the stronger of the two: yield strength 400 MPa (58 ksi) against 370 MPa (53.7 ksi) for G9Ni14 QT-HS, about 8% more; tensile strength follows at 560 MPa (81.2 ksi) vs 530 MPa (76.9 ksi). G9Ni14-QT is harder — 175 HB against 165 HB for G9Ni14 QT-HS — which matters for wear surfaces and threads.
G9Ni14-QTChoose it when strength drives the design, or when surface hardness matters.
G9Ni14-QT vs G9Ni14 QT-HS: 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.
Elastic (Young's) Modulus
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 B
Hardness, Vickers
Same in both: Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 165 GPa23.9 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) 1,440°C2,624 °F · Liquidus Temperature 1,495°C2,723 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.5 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 65 / 100 · Formability (cold) 25 / 100 · Castability 65 / 100 · Brazeability / Solderability 45 / 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) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 75%
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.
G9Ni14-QT vs G9Ni14 QT-HS — frequently asked
Is G9Ni14-QT stronger than G9Ni14 QT-HS?
Yes. G9Ni14-QT has a typical yield strength of 400 MPa (58 ksi) against 370 MPa (53.7 ksi) for G9Ni14 QT-HS — about 8% more. Tensile strength is 560 MPa (81.2 ksi) vs 530 MPa (76.9 ksi).
Which condition does FabDigit quote by default, QT or QT-HS?
QT is the default G9Ni14 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.
When should I choose G9Ni14-QT over G9Ni14 QT-HS?
Pick G9Ni14-QT when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in G9Ni14-QT and G9Ni14 QT-HS 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.