Aluminum EN AC-42100-T5 vs EN AC-42100-T61
Aluminum · EN AC-42100 temper comparison
EN AC-42100-T5 and EN AC-42100-T61 are two conditions of the same aluminum grade, EN AC-42100: T5 (cooled from hot working and artificially aged) versus T61 (T6 variant, underaged). The chemistry is identical, so every difference below comes from the condition. EN AC-42100-T61 is the stronger of the two: yield strength 207 MPa (30 ksi) against 125 MPa (18.1 ksi) for EN AC-42100-T5, about 66% more; tensile strength follows at 283 MPa (41 ksi) vs 195 MPa (28.3 ksi). EN AC-42100-T61 is the more ductile: elongation 10% versus 3% for EN AC-42100-T5, and EN AC-42100-T61 is harder (90 HB vs 65 HB). EN AC-42100-T5 runs hotter in service (175°C vs 150°C continuous).
EN AC-42100-T5Choose it when the part sees heat.
EN AC-42100-T61Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
EN AC-42100-T5 vs EN AC-42100-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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 71 GPa10.3 Msi · Poisson's Ratio 0.33 · Fracture Toughness (K_IC) 24 MPa·√m21.8 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 2.68 g/cm³0.1 lb/in³ · Melting Point (Solidus) 557°C1,035 °F · Liquidus Temperature 613°C1,135 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 159 W/m·K91.9 BTU/hr·ft·°F · 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) -0.82 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 90% · Weldability 75 / 100 · Formability (cold) 15 / 100 · Castability 95 / 100 · Brazeability / Solderability 30 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 155 MJ/kg66,638 BTU/lb · Embodied Carbon (primary production) 10.5 kg CO₂/kg · Embodied Water 1,100 L/kg132 gal/lb · Typical Recycled Content 30%
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.
EN AC-42100-T5 vs EN AC-42100-T61 — frequently asked
Is EN AC-42100-T61 stronger than EN AC-42100-T5?
Yes. EN AC-42100-T61 has a typical yield strength of 207 MPa (30 ksi) against 125 MPa (18.1 ksi) for EN AC-42100-T5 — about 66% more. Tensile strength is 283 MPa (41 ksi) vs 195 MPa (28.3 ksi).
Which condition does FabDigit quote by default, T5 or T61?
T6 is the default EN AC-42100 condition in the FabDigit quote flow (neither T5 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, EN AC-42100-T5 or EN AC-42100-T61?
EN AC-42100-T61, by a small margin. Both rate good for machinability — 60/100 against 55/100 for EN AC-42100-T5.
Ready to make it?
Upload a CAD file and FabDigit prices the part in EN AC-42100-T5 and EN AC-42100-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.