Aluminum A242.0-F vs A242.0-O
Aluminum · A242.0 temper comparison
A242.0-F and A242.0-O are two conditions of the same aluminum grade, A242.0: F (as fabricated) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. A242.0-O is the stronger of the two: yield strength 124 MPa (18 ksi) against 105 MPa (15.2 ksi) for A242.0-F, about 18% more; tensile strength follows at 186 MPa (27 ksi) vs 165 MPa (23.9 ksi). In exchange, A242.0-F is the more ductile: elongation 1.5% versus 1% for A242.0-O, and A242.0-O is harder (70 HB vs 65 HB). A242.0-O runs hotter in service (300°C vs 150°C continuous) and A242.0-O conducts heat better (155 W/m·K vs 130 W/m·K).
A242.0-FChoose it when the part is bent, formed or impact-loaded.
A242.0-OChoose it when strength drives the design, or when the part sees heat.
A242.0-F vs A242.0-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)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 71 GPa10.3 Msi · Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 72 GPa10.4 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.81 g/cm³0.1 lb/in³ · Melting Point (Solidus) 528°C982 °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 963 J/kg·K0.23 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22.5 µm/m·K12.5 µin/in·°F · Latent Heat of Fusion 389 J/g167 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) -0.75 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 22 / 100 · Castability 42 / 100 · Brazeability / Solderability 15 / 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) 12.5 kg CO₂/kg · Embodied Water 1,150 L/kg138 gal/lb · Typical Recycled Content 25%
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.
A242.0-F vs A242.0-O — frequently asked
Is A242.0-O stronger than A242.0-F?
Yes. A242.0-O has a typical yield strength of 124 MPa (18 ksi) against 105 MPa (15.2 ksi) for A242.0-F — about 18% more. Tensile strength is 186 MPa (27 ksi) vs 165 MPa (23.9 ksi).
Which condition does FabDigit quote by default, F or O?
T75 is the default A242.0 condition in the FabDigit quote flow (neither F 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.
When should I choose A242.0-F over A242.0-O?
Pick A242.0-F when the part is bent, formed or impact-loaded. Pick A242.0-O when strength drives the design, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A242.0-F and A242.0-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.