Aluminum 6101B-T6 vs 6101B-T7
Aluminum · 6101B temper comparison
6101B-T6 and 6101B-T7 are two conditions of the same aluminum grade, 6101B: T6 (solution heat treated and artificially aged) versus T7 (solution heat treated and overaged (stabilized)). The chemistry is identical, so every difference below comes from the condition. 6101B-T6 is the stronger of the two: yield strength 165 MPa (23.9 ksi) against 125 MPa (18.1 ksi) for 6101B-T7, about 32% more; tensile strength follows at 205 MPa (29.7 ksi) vs 170 MPa (24.7 ksi). In exchange, 6101B-T7 is the more ductile: elongation 14% versus 10% for 6101B-T6, and 6101B-T6 is harder (70 HB vs 55 HB). 6101B-T7 runs hotter in service (200°C vs 150°C continuous).
6101B-T6Choose it when strength drives the design.
6101B-T7Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
6101B-T6 vs 6101B-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)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 69 GPa10 Msi · Shear Modulus 26 GPa3.8 Msi · Bulk Modulus 68 GPa9.9 Msi · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.7 g/cm³0.1 lb/in³ · Melting Point (Solidus) 615°C1,139 °F · Liquidus Temperature 652°C1,206 °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 897 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.5 µm/m·K13.1 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
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.78 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 150% · Weldability 85 / 100 · Brazeability / Solderability 70 / 100 · Polishability 70 / 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 20%
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.
6101B-T6 vs 6101B-T7 — frequently asked
Is 6101B-T6 stronger than 6101B-T7?
Yes. 6101B-T6 has a typical yield strength of 165 MPa (23.9 ksi) against 125 MPa (18.1 ksi) for 6101B-T7 — about 32% more. Tensile strength is 205 MPa (29.7 ksi) vs 170 MPa (24.7 ksi).
Which condition does FabDigit quote by default, T6 or T7?
T6 is the default 6101B condition in the FabDigit quote flow. 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.
Which is easier to machine, 6101B-T6 or 6101B-T7?
6101B-T6, by a small margin. Both rate fair for machinability — 50/100 against 45/100 for 6101B-T7.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 6101B-T6 and 6101B-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.