Steel DD11-HR vs DD11-N
Steel · DD11 temper comparison
DD11-HR and DD11-N are two conditions of the same steel grade, DD11: HR (hot rolled) versus N (normalized). The chemistry is identical, so every difference below comes from the condition. DD11-HR is the stronger of the two: yield strength 225 MPa (32.6 ksi) against 210 MPa (30.5 ksi) for DD11-N, about 7% more; tensile strength follows at 385 MPa (55.8 ksi) vs 360 MPa (52.2 ksi). In exchange, DD11-N is the more ductile: elongation 35% versus 31% for DD11-HR, and DD11-HR is harder (112 HB vs 105 HB).
DD11-HRChoose it when strength drives the design.
DD11-NChoose it when the part is bent, formed or impact-loaded.
DD11-HR vs DD11-N: 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)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 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) 1,490°C2,714 °F · Liquidus Temperature 1,520°C2,768 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 470 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 270 J/g116 BTU/lb · Max Service Temperature (continuous) 350°C662 °F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 11 % IACS · Electrical Resistivity 1.6×10⁻⁷ Ω·m6.3 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 %)
Weldability
Formability (cold)
Same in both: Brazeability / Solderability 75 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 2.1 kg CO₂/kg · Embodied Water 40 L/kg4.8 gal/lb · Typical Recycled Content 25%
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.
DD11-HR vs DD11-N — frequently asked
Is DD11-HR stronger than DD11-N?
Yes. DD11-HR has a typical yield strength of 225 MPa (32.6 ksi) against 210 MPa (30.5 ksi) for DD11-N — about 7% more. Tensile strength is 385 MPa (55.8 ksi) vs 360 MPa (52.2 ksi).
Which condition does FabDigit quote by default, HR or N?
HRPO is the default DD11 condition in the FabDigit quote flow (neither HR nor N). 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 DD11-HR over DD11-N?
Pick DD11-HR when strength drives the design. Pick DD11-N when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in DD11-HR and DD11-N 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.