Steel 24CrMo13-6 +C vs 24CrMo13-6 +QT-100
Steel · 24CrMo13-6 temper comparison
24CrMo13-6 +C and 24CrMo13-6 +QT-100 are two conditions of the same steel grade, 24CrMo13-6: +C (cold drawn) versus +QT-100 (+QT). The chemistry is identical, so every difference below comes from the condition. 24CrMo13-6 +QT-100 is the stronger of the two: yield strength 870 MPa (126 ksi) against 650 MPa (94.3 ksi) for 24CrMo13-6 +C, about 34% more; tensile strength follows at 1,080 MPa (157 ksi) vs 850 MPa (123 ksi). 24CrMo13-6 +QT-100 is the more ductile: elongation 13% versus 10% for 24CrMo13-6 +C, and 24CrMo13-6 +QT-100 is harder (330 HB vs 260 HB). 24CrMo13-6 +QT-100 runs hotter in service (500°C vs 300°C continuous). On the shop floor, 24CrMo13-6 +C machines more easily (50 vs 40 out of 100).
24CrMo13-6 +CChoose it when the part is machined in volume.
24CrMo13-6 +QT-100Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
24CrMo13-6 +C vs 24CrMo13-6 +QT-100: 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.
24CrMo13-6 +C24CrMo13-6 +QT-100
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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
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 · Fracture Toughness (K_IC) 75 MPa·√m68.3 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.8 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.8 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 2.7×10⁻⁷ Ω·m10.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 15 / 100
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: Brazeability / Solderability 45 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 25%
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.
24CrMo13-6 +C vs 24CrMo13-6 +QT-100 — frequently asked
Is 24CrMo13-6 +QT-100 stronger than 24CrMo13-6 +C?
Yes. 24CrMo13-6 +QT-100 has a typical yield strength of 870 MPa (126 ksi) against 650 MPa (94.3 ksi) for 24CrMo13-6 +C — about 34% more. Tensile strength is 1,080 MPa (157 ksi) vs 850 MPa (123 ksi).
Which condition does FabDigit quote by default, +C or +QT-100?
+QT-100 is the default 24CrMo13-6 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.
Which is easier to machine, 24CrMo13-6 +C or 24CrMo13-6 +QT-100?
24CrMo13-6 +C, by a small margin. Both rate fair for machinability — 50/100 against 40/100 for 24CrMo13-6 +QT-100; for welding the order is 24CrMo13-6 +C first (poor, 25/100) then 24CrMo13-6 +QT-100 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 24CrMo13-6 +C and 24CrMo13-6 +QT-100 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.