Stainless Steel 1.4011-QT315 vs 1.4011-QT700
Stainless Steel · 1.4011 temper comparison
1.4011-QT315 and 1.4011-QT700 are two conditions of the same stainless steel grade, 1.4011: QT315 (hardened and tempered ~315 °C) versus QT700 (hardened and tempered 675–730 °C). The chemistry is identical, so every difference below comes from the condition. 1.4011-QT315 is the stronger of the two: yield strength 1,000 MPa (145 ksi) against 480 MPa (69.6 ksi) for 1.4011-QT700, about 108% more; tensile strength follows at 1,250 MPa (181 ksi) vs 690 MPa (100 ksi). In exchange, 1.4011-QT700 is the more ductile: elongation 26% versus 8% for 1.4011-QT315, and 1.4011-QT315 is harder (375 HB vs 200 HB). 1.4011-QT700 runs hotter in service (650°C vs 280°C continuous). On the shop floor, 1.4011-QT700 machines more easily (fair vs poor) and 1.4011-QT700 welds better (fair vs poor).
1.4011-QT315Choose it when strength drives the design.
1.4011-QT700Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4011-QT315 vs 1.4011-QT700: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless 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 stainless 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 C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.28 · Compressive Strength 560 MPa81.2 ksi · Shear Strength 460 MPa66.7 ksi
Physical
Density and transition temperatures.
Same in both: Density 7.61 g/cm³0.27 lb/in³ · Melting Point (Solidus) 1,480°C2,696 °F · Liquidus Temperature 1,530°C2,786 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 24.9 W/m·K14.4 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.5 µm/m·K5.8 µin/in·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3 % IACS · Electrical Resistivity 5.7×10⁻⁷ Ω·m22.4 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.28 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Polishability
Same in both: Formability (cold) 10 / 100 · Castability 70 / 100 · Brazeability / Solderability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 42 MJ/kg18,057 BTU/lb · Embodied Carbon (primary production) 3.4 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 75%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
1.4011-QT315 vs 1.4011-QT700 — frequently asked
Is 1.4011-QT315 stronger than 1.4011-QT700?
Yes. 1.4011-QT315 has a typical yield strength of 1,000 MPa (145 ksi) against 480 MPa (69.6 ksi) for 1.4011-QT700 — about 108% more. Tensile strength is 1,250 MPa (181 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, QT315 or QT700?
N+T is the default 1.4011 condition in the FabDigit quote flow (neither QT315 nor QT700). 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, 1.4011-QT315 or 1.4011-QT700?
1.4011-QT700. Its machinability rates fair (50/100) against poor (25/100) for 1.4011-QT315; for welding the order is 1.4011-QT700 first (fair, 45/100) then 1.4011-QT315 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4011-QT315 and 1.4011-QT700 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.