Aluminum 2N01-O vs 2N01-T73
Aluminum · 2N01 temper comparison
2N01-O and 2N01-T73 are two conditions of the same aluminum grade, 2N01: O (annealed) versus T73 (solution heat treated and overaged for stress-corrosion resistance). The chemistry is identical, so every difference below comes from the condition. 2N01-T73 is the stronger of the two: yield strength 260 MPa (37.7 ksi) against 95 MPa (13.8 ksi) for 2N01-O, about 174% more; tensile strength follows at 355 MPa (51.5 ksi) vs 185 MPa (26.8 ksi). In exchange, 2N01-O is the more ductile: elongation 20% versus 13% for 2N01-T73, and 2N01-T73 is harder (105 HB vs 55 HB). 2N01-T73 runs hotter in service (220°C vs 200°C continuous) and 2N01-O conducts heat better (180 W/m·K vs 160 W/m·K). On the shop floor, 2N01-T73 machines more easily (very good vs fair).
2N01-OChoose it when the part is bent, formed or impact-loaded.
2N01-T73Choose it when strength drives the design, or when the part sees heat.
2N01-O vs 2N01-T73: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum 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 aluminum 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, Vickers
Same in both: Elastic (Young's) Modulus 74 GPa10.7 Msi · Shear Modulus 27.5 GPa4 Msi · Bulk Modulus 76 GPa11 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.82 g/cm³0.1 lb/in³ · Melting Point (Solidus) 505°C941 °F · Liquidus Temperature 635°C1,175 °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 875 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22.3 µm/m·K12.4 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature -196°C-321 °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) -0.69 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 25 / 100 · Brazeability / Solderability 15 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 205 MJ/kg88,134 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,150 L/kg138 gal/lb · Typical Recycled Content 12%
Strength versus weight
Yield strength against density for every aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
2N01-O vs 2N01-T73 — frequently asked
Is 2N01-T73 stronger than 2N01-O?
Yes. 2N01-T73 has a typical yield strength of 260 MPa (37.7 ksi) against 95 MPa (13.8 ksi) for 2N01-O — about 174% more. Tensile strength is 355 MPa (51.5 ksi) vs 185 MPa (26.8 ksi).
Which condition does FabDigit quote by default, O or T73?
T6 is the default 2N01 condition in the FabDigit quote flow (neither O nor T73). 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, 2N01-O or 2N01-T73?
2N01-T73. Its machinability rates very good (70/100) against fair (45/100) for 2N01-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2N01-O and 2N01-T73 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.