Steel EN41B Annealed vs EN41B Q&T
Steel · EN41B temper comparison
EN41B Annealed and EN41B Q&T are two conditions of the same steel grade, EN41B: Annealed versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. EN41B Q&T is the stronger of the two: yield strength 740 MPa (107 ksi) against 450 MPa (65.3 ksi) for EN41B Annealed, about 64% more; tensile strength follows at 925 MPa (134 ksi) vs 700 MPa (102 ksi). In exchange, EN41B Annealed is the more ductile: elongation 20% versus 15% for EN41B Q&T, and EN41B Q&T is harder (269 HB vs 200 HB). On the shop floor, EN41B Annealed machines more easily (good vs fair).
EN41B AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
EN41B Q&TChoose it when strength drives the design.
EN41B Annealed vs EN41B Q&T: 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
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 760 MPa110 ksi · Shear Strength 560 MPa81.2 ksi · Fatigue Strength (Endurance Limit) 450 MPa65.3 ksi · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in · Hardness, Rockwell C 27 HRC · Hardness, Vickers 285 HV
Physical
Density and transition temperatures.
Same in both: Density 7.8 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 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) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 260 J/g112 BTU/lb · Max Service Temperature (continuous) 450°C842 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: 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 20 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.3 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.
EN41B Annealed vs EN41B Q&T — frequently asked
Is EN41B Q&T stronger than EN41B Annealed?
Yes. EN41B Q&T has a typical yield strength of 740 MPa (107 ksi) against 450 MPa (65.3 ksi) for EN41B Annealed — about 64% more. Tensile strength is 925 MPa (134 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, Annealed or Q&T?
Q&T is the default EN41B 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, EN41B Annealed or EN41B Q&T?
EN41B Annealed. Its machinability rates good (60/100) against fair (50/100) for EN41B Q&T.
Ready to make it?
Upload a CAD file and FabDigit prices the part in EN41B Annealed and EN41B Q&T 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.