Aluminum AC3A F-MOD vs AC3A-O
Aluminum · AC3A temper comparison
AC3A F-MOD and AC3A-O are two conditions of the same aluminum grade, AC3A: F-MOD (f) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. AC3A F-MOD is the stronger of the two: yield strength 80 MPa (11.6 ksi) against 65 MPa (9.43 ksi) for AC3A-O, about 23% more; tensile strength follows at 190 MPa (27.6 ksi) vs 150 MPa (21.8 ksi). AC3A F-MOD is the more ductile: elongation 11% versus 9% for AC3A-O, and AC3A F-MOD is harder (55 HB vs 45 HB). AC3A-O conducts electricity better (36 % IACS vs 32 % IACS).
AC3A F-MODChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
AC3A F-MOD vs AC3A-O: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 71 GPa10.3 Msi · Shear Modulus 26.5 GPa3.8 Msi · Bulk Modulus 70 GPa10.2 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.66 g/cm³0.1 lb/in³ · Melting Point (Solidus) 574°C1,065 °F · Liquidus Temperature 582°C1,080 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 963 J/kg·K0.23 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 20.5 µm/m·K11.4 µin/in·°F · Latent Heat of Fusion 389 J/g167 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · 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) -0.83 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 95 / 100 · Brazeability / Solderability 35 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 200 MJ/kg85,985 BTU/lb · Embodied Carbon (primary production) 12 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 70%
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.
AC3A F-MOD vs AC3A-O — frequently asked
Is AC3A F-MOD stronger than AC3A-O?
Yes. AC3A F-MOD has a typical yield strength of 80 MPa (11.6 ksi) against 65 MPa (9.43 ksi) for AC3A-O — about 23% more. Tensile strength is 190 MPa (27.6 ksi) vs 150 MPa (21.8 ksi).
Which condition does FabDigit quote by default, F-MOD or O?
F is the default AC3A condition in the FabDigit quote flow (neither F-MOD nor O). 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, AC3A F-MOD or AC3A-O?
AC3A F-MOD, by a small margin. Both rate fair for machinability — 45/100 against 37/100 for AC3A-O.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AC3A F-MOD and AC3A-O 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.