Steel 25CrMo4 +C vs 25CrMo4 Q&T
Steel · 25CrMo4 temper comparison
25CrMo4 +C and 25CrMo4 Q&T are two conditions of the same steel grade, 25CrMo4: +C (cold drawn) versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. 25CrMo4 Q&T is the stronger of the two: tensile strength 870 MPa (126 ksi) against 780 MPa (113 ksi) for 25CrMo4 +C, about 12% more. 25CrMo4 Q&T is the more ductile: elongation 16% versus 10% for 25CrMo4 +C, and 25CrMo4 Q&T is harder (270 HB vs 235 HB). On the shop floor, 25CrMo4 +C machines more easily (65 vs 55 out of 100).
25CrMo4 +CChoose it when the part is machined in volume.
25CrMo4 Q&TChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
25CrMo4 +C vs 25CrMo4 Q&T: 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 660 MPa95.7 ksi · Shear Strength 520 MPa75.4 ksi · Fracture Toughness (K_IC) 90 MPa·√m81.9 ksi·√in · Hardness, Rockwell C 28 HRC
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,500°C2,732 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 42 W/m·K24.3 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 500°C932 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 13 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 65 / 100 · Brazeability / Solderability 60 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 31 MJ/kg13,328 BTU/lb · Embodied Carbon (primary production) 2.2 kg CO₂/kg · Embodied Water 60 L/kg7.2 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.
25CrMo4 +C vs 25CrMo4 Q&T — frequently asked
Is 25CrMo4 Q&T stronger than 25CrMo4 +C?
Yes. 25CrMo4 Q&T has a typical tensile strength of 870 MPa (126 ksi) against 780 MPa (113 ksi) for 25CrMo4 +C — about 12% more.
Which condition does FabDigit quote by default, +C or Q&T?
Q&T is the default 25CrMo4 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, 25CrMo4 +C or 25CrMo4 Q&T?
25CrMo4 +C, by a small margin. Both rate good for machinability — 65/100 against 55/100 for 25CrMo4 Q&T.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 25CrMo4 +C and 25CrMo4 Q&T 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.