Steel GS240 +NT vs GS240 +QT
Steel · GS240 temper comparison
GS240 +NT and GS240 +QT are two conditions of the same steel grade, GS240: +NT (normalized and tempered) versus +QT (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. GS240 +QT is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 260 MPa (37.7 ksi) for GS240 +NT, about 46% more; tensile strength follows at 570 MPa (82.7 ksi) vs 470 MPa (68.2 ksi). In exchange, GS240 +NT is the more ductile: elongation 25% versus 20% for GS240 +QT, and GS240 +QT is harder (185 HB vs 145 HB).
GS240 +NTChoose it when the part is bent, formed or impact-loaded.
GS240 +QTChoose it when strength drives the design.
GS240 +NT vs GS240 +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
Reduction in Area
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 265 MPa38.4 ksi · Shear Strength 320 MPa46.4 ksi · Hardness, Vickers 158 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,505°C2,741 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Thermal Conductivity 50 W/m·K28.9 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10 % IACS · Electrical Resistivity 1.7×10⁻⁷ Ω·m6.69 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 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 62 / 100 · Formability (cold) 25 / 100 · Castability 72 / 100 · Brazeability / Solderability 70 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 24 MJ/kg10,318 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 85%
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.
GS240 +NT vs GS240 +QT — frequently asked
Is GS240 +QT stronger than GS240 +NT?
Yes. GS240 +QT has a typical yield strength of 380 MPa (55.1 ksi) against 260 MPa (37.7 ksi) for GS240 +NT — about 46% more. Tensile strength is 570 MPa (82.7 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, +NT or +QT?
+N is the default GS240 condition in the FabDigit quote flow (neither +NT 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, GS240 +NT or GS240 +QT?
GS240 +NT. Its weldability rates excellent (86/100) against very good (78/100) for GS240 +QT.
Ready to make it?
Upload a CAD file and FabDigit prices the part in GS240 +NT and GS240 +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.