Steel Cr12 Annealed vs Cr12 Hot Rolled
Steel · Cr12 temper comparison
Cr12 Annealed and Cr12 Hot Rolled are two conditions of the same steel grade, Cr12: Annealed versus Hot Rolled. The chemistry is identical, so every difference below comes from the condition. Cr12 Hot Rolled is the stronger of the two: yield strength 800 MPa (116 ksi) against 480 MPa (69.6 ksi) for Cr12 Annealed, about 67% more; tensile strength follows at 1,100 MPa (160 ksi) vs 820 MPa (119 ksi). In exchange, Cr12 Annealed is the more ductile: elongation 12% versus 5% for Cr12 Hot Rolled, and Cr12 Hot Rolled is harder (340 HB vs 240 HB). On the shop floor, Cr12 Annealed machines more easily (32 vs 18 out of 100).
Cr12 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Cr12 Hot RolledChoose it when strength drives the design.
Cr12 Annealed vs Cr12 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.
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
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 0.28
Physical
Density and transition temperatures.
Same in both: Density 7.7 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 20 W/m·K11.6 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 250 J/g107 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.7 % IACS · Electrical Resistivity 6.5×10⁻⁷ Ω·m25.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
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 35 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 36 MJ/kg15,477 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 45%
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.
Cr12 Annealed vs Cr12 Hot Rolled — frequently asked
Is Cr12 Hot Rolled stronger than Cr12 Annealed?
Yes. Cr12 Hot Rolled has a typical yield strength of 800 MPa (116 ksi) against 480 MPa (69.6 ksi) for Cr12 Annealed — about 67% more. Tensile strength is 1,100 MPa (160 ksi) vs 820 MPa (119 ksi).
Which condition does FabDigit quote by default, Annealed or Hot Rolled?
Annealed is the default Cr12 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, Cr12 Annealed or Cr12 Hot Rolled?
Cr12 Annealed, by a small margin. Both rate poor for machinability — 32/100 against 18/100 for Cr12 Hot Rolled.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Cr12 Annealed and Cr12 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.