Steel A217 C12A-ANN vs A217 C12A N+T
Steel · A217 C12A temper comparison
A217 C12A-ANN and A217 C12A N+T are two conditions of the same steel grade, A217 C12A: ANN (annealed) versus N+T (normalized and tempered). The chemistry is identical, so every difference below comes from the condition. A217 C12A N+T is the stronger of the two: yield strength 490 MPa (71.1 ksi) against 380 MPa (55.1 ksi) for A217 C12A-ANN, about 29% more; tensile strength follows at 680 MPa (98.6 ksi) vs 600 MPa (87 ksi). A217 C12A N+T is harder — 215 HB against 185 HB for A217 C12A-ANN — which matters for wear surfaces and threads. A217 C12A N+T runs hotter in service (600°C vs 450°C continuous). On the shop floor, A217 C12A-ANN forms better (25 vs 15 out of 100).
A217 C12A N+TChoose it when strength drives the design, or when surface hardness matters.
A217 C12A-ANN vs A217 C12A N+T: 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.
Elastic (Young's) Modulus
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 C
Hardness, Vickers
Same in both: Shear Modulus 84 GPa12.2 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 7.77 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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.8 µm/m·K6 µin/in·°F · Latent Heat of Fusion 270 J/g116 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).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.55 V
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 55 / 100 · Brazeability / Solderability 25 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 75%
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.
A217 C12A-ANN vs A217 C12A N+T — frequently asked
Is A217 C12A N+T stronger than A217 C12A-ANN?
Yes. A217 C12A N+T has a typical yield strength of 490 MPa (71.1 ksi) against 380 MPa (55.1 ksi) for A217 C12A-ANN — about 29% more. Tensile strength is 680 MPa (98.6 ksi) vs 600 MPa (87 ksi).
Which condition does FabDigit quote by default, ANN or N+T?
N+T is the default A217 C12A 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, A217 C12A-ANN or A217 C12A N+T?
A217 C12A-ANN, by a small margin. Both rate fair for machinability — 45/100 against 38/100 for A217 C12A N+T; for welding the order is A217 C12A-ANN first (fair, 40/100) then A217 C12A N+T (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A217 C12A-ANN and A217 C12A N+T 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.