Steel 18CrNiMo7-6 Cold Drawn vs 18CrNiMo7-6 Hot Rolled
Steel · 18CrNiMo7-6 temper comparison
18CrNiMo7-6 Cold Drawn and 18CrNiMo7-6 Hot Rolled are two conditions of the same steel grade, 18CrNiMo7-6: Cold Drawn versus Hot Rolled. The chemistry is identical, so every difference below comes from the condition. 18CrNiMo7-6 Cold Drawn is the stronger of the two: yield strength 600 MPa (87 ksi) against 500 MPa (72.5 ksi) for 18CrNiMo7-6 Hot Rolled, about 20% more. In exchange, 18CrNiMo7-6 Hot Rolled is the more ductile: elongation 14% versus 10% for 18CrNiMo7-6 Cold Drawn. 18CrNiMo7-6 Hot Rolled runs hotter in service (350°C vs 300°C continuous). On the shop floor, 18CrNiMo7-6 Cold Drawn machines more easily (good vs fair).
18CrNiMo7-6 Cold DrawnChoose it when strength drives the design, or when the part is machined in volume.
18CrNiMo7-6 Hot RolledChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
18CrNiMo7-6 Cold Drawn vs 18CrNiMo7-6 Hot Rolled: 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.
18CrNiMo7-6 Cold Drawn18CrNiMo7-6 Hot Rolled
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
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: 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
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 1,495°C2,723 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 40 W/m·K23.1 BTU/hr·ft·°F · 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 · 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: Corrosion Resistance 12 / 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: Castability 25 / 100 · Brazeability / Solderability 55 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 65 L/kg7.8 gal/lb · Typical Recycled Content 35%
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.
18CrNiMo7-6 Cold Drawn vs 18CrNiMo7-6 Hot Rolled — frequently asked
Is 18CrNiMo7-6 Cold Drawn stronger than 18CrNiMo7-6 Hot Rolled?
Yes. 18CrNiMo7-6 Cold Drawn has a typical yield strength of 600 MPa (87 ksi) against 500 MPa (72.5 ksi) for 18CrNiMo7-6 Hot Rolled — about 20% more. Tensile strength is 750 MPa (109 ksi) vs 800 MPa (116 ksi).
Which condition does FabDigit quote by default, Cold Drawn or Hot Rolled?
Annealed is the default 18CrNiMo7-6 condition in the FabDigit quote flow (neither Cold Drawn nor Hot Rolled). 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, 18CrNiMo7-6 Cold Drawn or 18CrNiMo7-6 Hot Rolled?
18CrNiMo7-6 Cold Drawn. Its machinability rates good (60/100) against fair (45/100) for 18CrNiMo7-6 Hot Rolled.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 18CrNiMo7-6 Cold Drawn and 18CrNiMo7-6 Hot Rolled 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.