Steel 11SMn30-CD vs 11SMn30-CR
Steel · 11SMn30 temper comparison
11SMn30-CD and 11SMn30-CR are two conditions of the same steel grade, 11SMn30: CD (cold drawn) versus CR (cold rolled). The chemistry is identical, so every difference below comes from the condition. 11SMn30-CR is the stronger of the two: yield strength 460 MPa (66.7 ksi) against 420 MPa (60.9 ksi) for 11SMn30-CD, about 10% more; tensile strength follows at 590 MPa (85.6 ksi) vs 560 MPa (81.2 ksi). In exchange, 11SMn30-CD is the more ductile: elongation 10% versus 8% for 11SMn30-CR, and 11SMn30-CR is harder (180 HB vs 170 HB). 11SMn30-CD runs hotter in service (300°C vs 250°C continuous).
11SMn30-CDChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
11SMn30-CRChoose it when strength drives the design.
11SMn30-CD vs 11SMn30-CR: 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
Compressive Strength
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 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 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 1,495°C2,723 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 50 W/m·K28.9 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.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 8 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 135% · Weldability 12 / 100 · Brazeability / Solderability 50 / 100 · Polishability 30 / 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 50 L/kg6 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.
11SMn30-CD vs 11SMn30-CR — frequently asked
Is 11SMn30-CR stronger than 11SMn30-CD?
Yes. 11SMn30-CR has a typical yield strength of 460 MPa (66.7 ksi) against 420 MPa (60.9 ksi) for 11SMn30-CD — about 10% more. Tensile strength is 590 MPa (85.6 ksi) vs 560 MPa (81.2 ksi).
Which condition does FabDigit quote by default, CD or CR?
HR is the default 11SMn30 condition in the FabDigit quote flow (neither CD nor CR). 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.
When should I choose 11SMn30-CD over 11SMn30-CR?
Pick 11SMn30-CD when the part is bent, formed or impact-loaded, or when the part sees heat. Pick 11SMn30-CR when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 11SMn30-CD and 11SMn30-CR 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.