Aluminum Al2O3f/AC8A-T5 vs Al2O3f/AC8A-T7
Aluminum · Al2O3f/AC8A temper comparison
Al2O3f/AC8A-T5 and Al2O3f/AC8A-T7 are two conditions of the same aluminum grade, Al2O3f/AC8A: T5 (cooled from hot working and artificially aged) versus T7 (solution heat treated and overaged (stabilized)). The chemistry is identical, so every difference below comes from the condition. Al2O3f/AC8A-T7 is the stronger of the two: yield strength 200 MPa (29 ksi) against 185 MPa (26.8 ksi) for Al2O3f/AC8A-T5, about 8% more. Al2O3f/AC8A-T7 is the more ductile: elongation 1% versus 0.7% for Al2O3f/AC8A-T5. Al2O3f/AC8A-T7 runs hotter in service (360°C vs 280°C continuous) and Al2O3f/AC8A-T7 conducts heat better (118 W/m·K vs 106 W/m·K).
Al2O3f/AC8A-T7Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
Al2O3f/AC8A-T5 vs Al2O3f/AC8A-T7: 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, Vickers
Same in both: Elastic (Young's) Modulus 94 GPa13.6 Msi · Shear Modulus 37 GPa5.4 Msi · Bulk Modulus 78 GPa11.3 Msi · Poisson's Ratio 0.3 · Hardness, Brinell 108 HB · Hardness, Rockwell B 62 HRB
Physical
Density and transition temperatures.
Same in both: Density 2.79 g/cm³0.1 lb/in³ · Melting Point (Solidus) 520°C968 °F · Liquidus Temperature 575°C1,067 °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 880 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.5 µm/m·K9.7 µin/in·°F · Latent Heat of Fusion 440 J/g189 BTU/lb · Min Service Temperature -50°C-58 °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) -0.8 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 10 / 100 · Formability (cold) 5 / 100 · Castability 55 / 100 · Brazeability / Solderability 15 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 120 MJ/kg51,591 BTU/lb · Embodied Carbon (primary production) 9 kg CO₂/kg · Embodied Water 1,000 L/kg120 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.
Al2O3f/AC8A-T5 vs Al2O3f/AC8A-T7 — frequently asked
Is Al2O3f/AC8A-T7 stronger than Al2O3f/AC8A-T5?
Yes. Al2O3f/AC8A-T7 has a typical yield strength of 200 MPa (29 ksi) against 185 MPa (26.8 ksi) for Al2O3f/AC8A-T5 — about 8% more. Tensile strength is 230 MPa (33.4 ksi) vs 220 MPa (31.9 ksi).
Which condition does FabDigit quote by default, T5 or T7?
T6 is the default Al2O3f/AC8A condition in the FabDigit quote flow (neither T5 nor T7). 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 Al2O3f/AC8A-T5 over Al2O3f/AC8A-T7?
Pick Al2O3f/AC8A-T7 when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Al2O3f/AC8A-T5 and Al2O3f/AC8A-T7 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.