Aluminum 6011-T4 vs 6011-T8
Aluminum · 6011 temper comparison
6011-T4 and 6011-T8 are two conditions of the same aluminum grade, 6011: T4 (solution heat treated and naturally aged) versus T8 (solution heat treated, cold worked and artificially aged). The chemistry is identical, so every difference below comes from the condition. 6011-T8 is the stronger of the two: yield strength 370 MPa (53.7 ksi) against 170 MPa (24.7 ksi) for 6011-T4, about 118% more; tensile strength follows at 400 MPa (58 ksi) vs 290 MPa (42.1 ksi). In exchange, 6011-T4 is the more ductile: elongation 20% versus 9% for 6011-T8, and 6011-T8 is harder (120 HB vs 80 HB). 6011-T8 runs hotter in service (150°C vs 100°C continuous). On the shop floor, 6011-T8 machines more easily (excellent vs very good).
6011-T4Choose it when the part is bent, formed or impact-loaded.
6011-T8Choose it when strength drives the design, or when the part sees heat.
6011-T4 vs 6011-T8: 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)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 69 GPa10 Msi · Shear Modulus 26 GPa3.8 Msi · Bulk Modulus 69 GPa10 Msi · Poisson's Ratio 0.33 · Fracture Toughness (K_IC) 30 MPa·√m27.3 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 2.72 g/cm³0.1 lb/in³ · Melting Point (Solidus) 585°C1,085 °F · Liquidus Temperature 650°C1,202 °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 896 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.4 µm/m·K13 µin/in·°F · Latent Heat of Fusion 395 J/g170 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Same in both: Electrical Resistivity 4.1×10⁻⁸ Ω·m1.61 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.77 V · Corrosion Resistance 55 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 190% · Brazeability / Solderability 35 / 100 · Polishability 60 / 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 1,100 L/kg132 gal/lb · Typical Recycled Content 35%
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.
6011-T4 vs 6011-T8 — frequently asked
Is 6011-T8 stronger than 6011-T4?
Yes. 6011-T8 has a typical yield strength of 370 MPa (53.7 ksi) against 170 MPa (24.7 ksi) for 6011-T4 — about 118% more. Tensile strength is 400 MPa (58 ksi) vs 290 MPa (42.1 ksi).
Which condition does FabDigit quote by default, T4 or T8?
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, 6011-T4 or 6011-T8?
6011-T8. Its machinability rates excellent (88/100) against very good (70/100) for 6011-T4; for welding the order is 6011-T4 first (fair, 45/100) then 6011-T8 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 6011-T4 and 6011-T8 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.