Steel A372 Grade A-A vs A372 Grade A-N
Steel · A372 Grade A temper comparison
A372 Grade A-A and A372 Grade A-N are two conditions of the same steel grade, A372 Grade A: A (solution annealed) versus N (normalized). The chemistry is identical, so every difference below comes from the condition. A372 Grade A-N is the stronger of the two: yield strength 300 MPa (43.5 ksi) against 250 MPa (36.3 ksi) for A372 Grade A-A, about 20% more; tensile strength follows at 530 MPa (76.9 ksi) vs 460 MPa (66.7 ksi). In exchange, A372 Grade A-A is the more ductile: elongation 32% versus 26% for A372 Grade A-N, and A372 Grade A-N is harder (155 HB vs 130 HB).
A372 Grade A-AChoose it when the part is bent, formed or impact-loaded.
A372 Grade A-NChoose it when strength drives the design.
A372 Grade A-A vs A372 Grade A-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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 300 MPa43.5 ksi · Shear Strength 330 MPa47.9 ksi · Fracture Toughness (K_IC) 85 MPa·√m77.4 ksi·√in · Hardness, Vickers 162 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °F
Thermal
How each material carries heat and how hot it can run.
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) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 425°C797 °F · Min Service Temperature -29°C-20 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 10 % IACS · Electrical Resistivity 1.7×10⁻⁷ Ω·m6.69 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 12 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Machinability 62 / 100 · Weldability 75 / 100 · Castability 50 / 100 · Brazeability / Solderability 65 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 45 L/kg5.4 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.
A372 Grade A-A vs A372 Grade A-N — frequently asked
Is A372 Grade A-N stronger than A372 Grade A-A?
Yes. A372 Grade A-N has a typical yield strength of 300 MPa (43.5 ksi) against 250 MPa (36.3 ksi) for A372 Grade A-A — about 20% more. Tensile strength is 530 MPa (76.9 ksi) vs 460 MPa (66.7 ksi).
Which condition does FabDigit quote by default, A or N?
N is the default A372 Grade A 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.
When should I choose A372 Grade A-A over A372 Grade A-N?
Pick A372 Grade A-A when the part is bent, formed or impact-loaded. Pick A372 Grade A-N when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A372 Grade A-A and A372 Grade A-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.