Aluminum 2124-T3 vs 2124-T8511
Aluminum · 2124 temper comparison
2124-T3 and 2124-T8511 are two conditions of the same aluminum grade, 2124: T3 (solution heat treated, cold worked and naturally aged) versus T8511 (solution treated, stress relieved by stretching with minor…). The chemistry is identical, so every difference below comes from the condition. 2124-T8511 is the stronger of the two: yield strength 435 MPa (63.1 ksi) against 325 MPa (47.1 ksi) for 2124-T3, about 34% more. In exchange, 2124-T3 is the more ductile: elongation 15% versus 7% for 2124-T8511. 2124-T8511 runs hotter in service (150°C vs 120°C continuous) and 2124-T8511 conducts heat better (152 W/m·K vs 121 W/m·K).
2124-T3Choose it when the part is bent, formed or impact-loaded.
2124-T8511Choose it when strength drives the design, or when the part sees heat.
2124-T3 vs 2124-T8511: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 73.1 GPa10.6 Msi · Shear Modulus 28 GPa4.1 Msi · Bulk Modulus 76 GPa11 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.78 g/cm³0.1 lb/in³ · Melting Point (Solidus) 502°C936 °F · Liquidus Temperature 638°C1,180 °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) 22.9 µm/m·K12.7 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) -0.64 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 20 / 100 · Brazeability / Solderability 10 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 210 MJ/kg90,284 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 5%
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.
2124-T3 vs 2124-T8511 — frequently asked
Is 2124-T8511 stronger than 2124-T3?
Yes. 2124-T8511 has a typical yield strength of 435 MPa (63.1 ksi) against 325 MPa (47.1 ksi) for 2124-T3 — about 34% more. Tensile strength is 480 MPa (69.6 ksi) vs 470 MPa (68.2 ksi).
Which condition does FabDigit quote by default, T3 or T8511?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, 2124-T3 or 2124-T8511?
2124-T8511, by a small margin. Both rate very good for machinability — 78/100 against 72/100 for 2124-T3.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2124-T3 and 2124-T8511 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.