Steel EN24T Annealed vs EN24T-HR
Steel · EN24T temper comparison
EN24T Annealed and EN24T-HR are two conditions of the same steel grade, EN24T: Annealed versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. EN24T-HR is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 460 MPa (66.7 ksi) for EN24T Annealed, about 22% more; tensile strength follows at 900 MPa (131 ksi) vs 700 MPa (102 ksi). In exchange, EN24T Annealed is the more ductile: elongation 22% versus 16% for EN24T-HR, and EN24T-HR is harder (265 HB vs 210 HB). On the shop floor, EN24T Annealed machines more easily (good vs fair).
EN24T AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
EN24T-HRChoose it when strength drives the design.
EN24T Annealed vs EN24T-HR: 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
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 580 MPa84.1 ksi · Shear Strength 540 MPa78.3 ksi · Fracture Toughness (K_IC) 85 MPa·√m77.4 ksi·√in · Hardness, Rockwell C 26 HRC · Hardness, Vickers 278 HV
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 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 44 W/m·K25.4 BTU/hr·ft·°F · Specific Heat Capacity 470 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) 400°C752 °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) -0.61 V · 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: Brazeability / Solderability 45 / 100 · Polishability 70 / 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 55 L/kg6.6 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.
EN24T Annealed vs EN24T-HR — frequently asked
Is EN24T-HR stronger than EN24T Annealed?
Yes. EN24T-HR has a typical yield strength of 560 MPa (81.2 ksi) against 460 MPa (66.7 ksi) for EN24T Annealed — about 22% more. Tensile strength is 900 MPa (131 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, Annealed or HR?
HR is the default EN24T 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, EN24T Annealed or EN24T-HR?
EN24T Annealed. Its machinability rates good (56/100) against fair (46/100) for EN24T-HR; for welding the order is EN24T Annealed first (fair, 35/100) then EN24T-HR (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in EN24T Annealed and EN24T-HR 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.