Steel 11SMn37-CD vs 11SMn37-HR
Steel · 11SMn37 temper comparison
11SMn37-CD and 11SMn37-HR are two conditions of the same steel grade, 11SMn37: CD (cold drawn) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. 11SMn37-CD is the stronger of the two: yield strength 420 MPa (60.9 ksi) against 280 MPa (40.6 ksi) for 11SMn37-HR, about 50% more; tensile strength follows at 560 MPa (81.2 ksi) vs 420 MPa (60.9 ksi). In exchange, 11SMn37-HR is the more ductile: elongation 22% versus 9% for 11SMn37-CD, and 11SMn37-CD is harder (170 HB vs 125 HB). 11SMn37-HR runs hotter in service (350°C vs 250°C continuous).
11SMn37-CDChoose it when strength drives the design.
11SMn37-HRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
11SMn37-CD vs 11SMn37-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 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Hardness, Vickers 180 HV
Physical
Density and transition temperatures.
Same in both: Density 7.87 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,500°C2,732 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 51 W/m·K29.5 BTU/hr·ft·°F · Specific Heat Capacity 470 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 247 J/g106 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10.5 % IACS · Electrical Resistivity 1.65×10⁻⁷ Ω·m6.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.65 V · Corrosion Resistance 8 / 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 15 / 100 · Brazeability / Solderability 45 / 100 · Polishability 40 / 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 50 L/kg6 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.
11SMn37-CD vs 11SMn37-HR — frequently asked
Is 11SMn37-CD stronger than 11SMn37-HR?
Yes. 11SMn37-CD has a typical yield strength of 420 MPa (60.9 ksi) against 280 MPa (40.6 ksi) for 11SMn37-HR — about 50% more. Tensile strength is 560 MPa (81.2 ksi) vs 420 MPa (60.9 ksi).
Which condition does FabDigit quote by default, CD or HR?
HR is the default 11SMn37 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, 11SMn37-CD or 11SMn37-HR?
11SMn37-CD, by a small margin. Both rate excellent for machinability — 95/100 against 88/100 for 11SMn37-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 11SMn37-CD and 11SMn37-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.