Steel 65Mn Annealed vs 65Mn Hot Rolled
Steel · 65Mn temper comparison
65Mn Annealed and 65Mn Hot Rolled are two conditions of the same steel grade, 65Mn: Annealed versus Hot Rolled. The chemistry is identical, so every difference below comes from the condition. 65Mn Hot Rolled is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 440 MPa (63.8 ksi) for 65Mn Annealed, about 18% more; tensile strength follows at 900 MPa (131 ksi) vs 760 MPa (110 ksi). In exchange, 65Mn Annealed is the more ductile: elongation 16% versus 12% for 65Mn Hot Rolled, and 65Mn Hot Rolled is harder (260 HB vs 215 HB). 65Mn Hot Rolled runs hotter in service (400°C vs 350°C continuous). On the shop floor, 65Mn Annealed machines more easily (50 vs 40 out of 100).
65Mn AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
65Mn Hot RolledChoose it when strength drives the design, or when the part sees heat.
65Mn Annealed vs 65Mn 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 206 GPa29.9 Msi · Shear Modulus 79 GPa11.5 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) 1,420°C2,588 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 45 W/m·K26 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.8 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8.5 % IACS · Electrical Resistivity 2×10⁻⁷ Ω·m7.87 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 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 25 / 100 · Castability 30 / 100 · Brazeability / Solderability 55 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 1.9 kg CO₂/kg · Embodied Water 40 L/kg4.8 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.
65Mn Annealed vs 65Mn Hot Rolled — frequently asked
Is 65Mn Hot Rolled stronger than 65Mn Annealed?
Yes. 65Mn Hot Rolled has a typical yield strength of 520 MPa (75.4 ksi) against 440 MPa (63.8 ksi) for 65Mn Annealed — about 18% more. Tensile strength is 900 MPa (131 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, Annealed or Hot Rolled?
Annealed is the default 65Mn 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, 65Mn Annealed or 65Mn Hot Rolled?
65Mn Annealed, by a small margin. Both rate fair for machinability — 50/100 against 40/100 for 65Mn Hot Rolled.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 65Mn Annealed and 65Mn 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.