Steel 5140 Annealed vs 5140-HR
Steel · 5140 temper comparison
5140 Annealed and 5140-HR are two conditions of the same steel grade, 5140: Annealed versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. 5140-HR is the stronger of the two: yield strength 440 MPa (63.8 ksi) against 293 MPa (42.5 ksi) for 5140 Annealed, about 50% more; tensile strength follows at 700 MPa (102 ksi) vs 572 MPa (83 ksi). In exchange, 5140 Annealed is the more ductile: elongation 28.6% versus 18% for 5140-HR, and 5140-HR is harder (200 HB vs 167 HB). On the shop floor, 5140 Annealed welds better (45 vs 35 out of 100).
5140 AnnealedChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
5140-HRChoose it when strength drives the design.
5140 Annealed vs 5140-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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 450 MPa65.3 ksi · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in · Hardness, Vickers 210 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 1,490°C2,714 °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 473 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 270 J/g116 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -30°C-22 °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: Castability 30 / 100 · Brazeability / Solderability 55 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 1.9 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.
5140 Annealed vs 5140-HR — frequently asked
Is 5140-HR stronger than 5140 Annealed?
Yes. 5140-HR has a typical yield strength of 440 MPa (63.8 ksi) against 293 MPa (42.5 ksi) for 5140 Annealed — about 50% more. Tensile strength is 700 MPa (102 ksi) vs 572 MPa (83 ksi).
Which condition does FabDigit quote by default, Annealed or HR?
HR is the default 5140 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, 5140 Annealed or 5140-HR?
5140 Annealed, by a small margin. Both rate good for machinability — 65/100 against 58/100 for 5140-HR; for welding the order is 5140 Annealed first (fair, 45/100) then 5140-HR (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 5140 Annealed and 5140-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.