Aluminum AC2A-T5 vs AC2A-T7
Aluminum · AC2A temper comparison
AC2A-T5 and AC2A-T7 are two conditions of the same aluminum grade, AC2A: 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. AC2A-T5 is the stronger of the two: yield strength 180 MPa (26.1 ksi) against 150 MPa (21.8 ksi) for AC2A-T7, about 20% more. In exchange, AC2A-T7 is the more ductile: elongation 2.5% versus 1.5% for AC2A-T5, and AC2A-T5 is harder (80 HB vs 75 HB). AC2A-T7 runs hotter in service (200°C vs 175°C continuous).
AC2A-T5Choose it when strength drives the design.
AC2A-T7Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
AC2A-T5 vs AC2A-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
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 74 GPa10.7 Msi · Shear Modulus 27.5 GPa4 Msi · Bulk Modulus 72 GPa10.4 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.79 g/cm³0.1 lb/in³ · Melting Point (Solidus) 516°C961 °F · Liquidus Temperature 604°C1,119 °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) 21.5 µm/m·K11.9 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 %)
Formability (cold)
Same in both: Weldability 35 / 100 · Castability 75 / 100 · Brazeability / Solderability 25 / 100 · Polishability 40 / 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 1,150 L/kg138 gal/lb · Typical Recycled Content 80%
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.
AC2A-T5 vs AC2A-T7 — frequently asked
Is AC2A-T5 stronger than AC2A-T7?
Yes. AC2A-T5 has a typical yield strength of 180 MPa (26.1 ksi) against 150 MPa (21.8 ksi) for AC2A-T7 — about 20% more. Tensile strength is 205 MPa (29.7 ksi) vs 215 MPa (31.2 ksi).
Which condition does FabDigit quote by default, T5 or T7?
T6 is the default AC2A 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 AC2A-T5 over AC2A-T7?
Pick AC2A-T5 when strength drives the design. Pick AC2A-T7 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AC2A-T5 and AC2A-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.