Steel EN9 Annealed vs EN9-CR
Steel · EN9 temper comparison
EN9 Annealed and EN9-CR are two conditions of the same steel grade, EN9: Annealed versus CR (cold rolled). The chemistry is identical, so every difference below comes from the condition. EN9-CR is the stronger of the two: yield strength 600 MPa (87 ksi) against 310 MPa (45 ksi) for EN9 Annealed, about 94% more; tensile strength follows at 750 MPa (109 ksi) vs 580 MPa (84.1 ksi). In exchange, EN9 Annealed is the more ductile: elongation 22% versus 9% for EN9-CR, and EN9-CR is harder (225 HB vs 170 HB). EN9 Annealed runs hotter in service (350°C vs 300°C continuous). On the shop floor, EN9 Annealed welds better (fair vs poor).
EN9 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
EN9-CRChoose it when strength drives the design.
EN9 Annealed vs EN9-CR: 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
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 207 GPa30 Msi · Shear Modulus 80 GPa11.6 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 1,490°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 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 10 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Same in both: Machinability 55 / 100 · Machinability Rating (AISI 1212 = 100 %) 60% · Castability 45 / 100 · Brazeability / Solderability 55 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 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.
EN9 Annealed vs EN9-CR — frequently asked
Is EN9-CR stronger than EN9 Annealed?
Yes. EN9-CR has a typical yield strength of 600 MPa (87 ksi) against 310 MPa (45 ksi) for EN9 Annealed — about 94% more. Tensile strength is 750 MPa (109 ksi) vs 580 MPa (84.1 ksi).
Which condition does FabDigit quote by default, Annealed or CR?
HR is the default EN9 condition in the FabDigit quote flow (neither Annealed nor CR). 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 welds better, EN9 Annealed or EN9-CR?
EN9 Annealed. Its weldability rates fair (40/100) against poor (30/100) for EN9-CR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in EN9 Annealed and EN9-CR 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.