Steel 1151-ANN vs 1151-N
Steel · 1151 temper comparison
1151-ANN and 1151-N are two conditions of the same steel grade, 1151: ANN (annealed) versus N (normalized). The chemistry is identical, so every difference below comes from the condition. 1151-N is the stronger of the two: yield strength 415 MPa (60.2 ksi) against 320 MPa (46.4 ksi) for 1151-ANN, about 30% more; tensile strength follows at 720 MPa (104 ksi) vs 585 MPa (84.8 ksi). In exchange, 1151-ANN is the more ductile: elongation 22% versus 18% for 1151-N, and 1151-N is harder (207 HB vs 167 HB).
1151-ANNChoose it when the part is bent, formed or impact-loaded.
1151-NChoose it when strength drives the design.
1151-ANN vs 1151-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 200 GPa29 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 140 GPa20.3 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 1,490°C2,714 °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) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · 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) -0.65 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: Castability 40 / 100 · Brazeability / Solderability 55 / 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 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.
1151-ANN vs 1151-N — frequently asked
Is 1151-N stronger than 1151-ANN?
Yes. 1151-N has a typical yield strength of 415 MPa (60.2 ksi) against 320 MPa (46.4 ksi) for 1151-ANN — about 30% more. Tensile strength is 720 MPa (104 ksi) vs 585 MPa (84.8 ksi).
Which condition does FabDigit quote by default, ANN or N?
CD is the default 1151 condition in the FabDigit quote flow (neither ANN 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 1151-ANN over 1151-N?
Pick 1151-ANN when the part is bent, formed or impact-loaded. Pick 1151-N when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1151-ANN and 1151-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.