Aluminum 6101-H111 vs 6101-T61
Aluminum · 6101 temper comparison
6101-H111 and 6101-T61 are two conditions of the same aluminum grade, 6101: H111 (slightly strain hardened) versus T61 (T6 variant, underaged). The chemistry is identical, so every difference below comes from the condition. 6101-T61 is the stronger of the two: yield strength 110 MPa (16 ksi) against 55 MPa (7.98 ksi) for 6101-H111, about 100% more; tensile strength follows at 150 MPa (21.8 ksi) vs 105 MPa (15.2 ksi). In exchange, 6101-H111 is the more ductile: elongation 25% versus 20% for 6101-T61, and 6101-T61 is harder (48 HB vs 28 HB). On the shop floor, 6101-T61 machines more easily (45 vs 35 out of 100).
6101-H111Choose it when the part is bent, formed or impact-loaded.
6101-T61Choose it when strength drives the design, or when the part is machined in volume.
6101-H111 vs 6101-T61: 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.
Bulk Modulus
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 · Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.7 g/cm³0.1 lb/in³ · Melting Point (Solidus) 621°C1,150 °F · Liquidus Temperature 654°C1,209 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Latent Heat of Fusion
Min Service Temperature
Same in both: Specific Heat Capacity 895 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 23.5 µm/m·K13.1 µin/in·°F · Max Service Temperature (continuous) 150°C302 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Weldability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 1,150 L/kg138 gal/lb
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.
6101-H111 vs 6101-T61 — frequently asked
Is 6101-T61 stronger than 6101-H111?
Yes. 6101-T61 has a typical yield strength of 110 MPa (16 ksi) against 55 MPa (7.98 ksi) for 6101-H111 — about 100% more. Tensile strength is 150 MPa (21.8 ksi) vs 105 MPa (15.2 ksi).
Which condition does FabDigit quote by default, H111 or T61?
T6 is the default 6101 condition in the FabDigit quote flow (neither H111 nor T61). 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, 6101-H111 or 6101-T61?
6101-T61, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for 6101-H111.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 6101-H111 and 6101-T61 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.