Steel 18CrNiMo7-6 Annealed vs 18CrNiMo7-6 Hot Rolled
Steel · 18CrNiMo7-6 temper comparison
18CrNiMo7-6 Annealed and 18CrNiMo7-6 Hot Rolled are two conditions of the same steel grade, 18CrNiMo7-6: Annealed versus Hot Rolled. The chemistry is identical, so every difference below comes from the condition. 18CrNiMo7-6 Hot Rolled is the stronger of the two: yield strength 500 MPa (72.5 ksi) against 370 MPa (53.7 ksi) for 18CrNiMo7-6 Annealed, about 35% more; tensile strength follows at 800 MPa (116 ksi) vs 640 MPa (92.8 ksi). In exchange, 18CrNiMo7-6 Annealed is the more ductile: elongation 20% versus 14% for 18CrNiMo7-6 Hot Rolled, and 18CrNiMo7-6 Hot Rolled is harder (245 HB vs 200 HB). On the shop floor, 18CrNiMo7-6 Annealed machines more easily (good vs fair).
18CrNiMo7-6 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
18CrNiMo7-6 Hot RolledChoose it when strength drives the design.
18CrNiMo7-6 Annealed 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 Annealed18CrNiMo7-6 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.
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 · Max Service Temperature (continuous) 350°C662 °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: Corrosion Resistance 12 / 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 45 / 100 · 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 Annealed vs 18CrNiMo7-6 Hot Rolled — frequently asked
Is 18CrNiMo7-6 Hot Rolled stronger than 18CrNiMo7-6 Annealed?
Yes. 18CrNiMo7-6 Hot Rolled has a typical yield strength of 500 MPa (72.5 ksi) against 370 MPa (53.7 ksi) for 18CrNiMo7-6 Annealed — about 35% more. Tensile strength is 800 MPa (116 ksi) vs 640 MPa (92.8 ksi).
Which condition does FabDigit quote by default, Annealed or Hot Rolled?
Annealed is the default 18CrNiMo7-6 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, 18CrNiMo7-6 Annealed or 18CrNiMo7-6 Hot Rolled?
18CrNiMo7-6 Annealed. Its machinability rates good (55/100) 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 Annealed 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.