Aluminum EN AC-45100-T4 vs EN AC-45100-T6
Aluminum · EN AC-45100 temper comparison
EN AC-45100-T4 and EN AC-45100-T6 are two conditions of the same aluminum grade, EN AC-45100: T4 (solution heat treated and naturally aged) versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. EN AC-45100-T6 is the stronger of the two: yield strength 215 MPa (31.2 ksi) against 115 MPa (16.7 ksi) for EN AC-45100-T4, about 87% more; tensile strength follows at 260 MPa (37.7 ksi) vs 230 MPa (33.4 ksi). In exchange, EN AC-45100-T4 is the more ductile: elongation 3.5% versus 1.2% for EN AC-45100-T6, and EN AC-45100-T6 is harder (100 HB vs 75 HB). EN AC-45100-T6 runs hotter in service (200°C vs 150°C continuous) and EN AC-45100-T6 conducts heat better (130 W/m·K vs 115 W/m·K).
EN AC-45100-T4Choose it when the part is bent, formed or impact-loaded.
EN AC-45100-T6Choose it when strength drives the design, or when the part sees heat.
EN AC-45100-T4 vs EN AC-45100-T6: 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
Shear Modulus
Bulk Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Poisson's Ratio 0.33
Physical
Density and transition temperatures.
Same in both: Density 2.75 g/cm³0.1 lb/in³ · Melting Point (Solidus) 525°C977 °F · Liquidus Temperature 610°C1,130 °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 963 J/kg·K0.23 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 22 µm/m·K12.2 µin/in·°F · Latent Heat of Fusion 425 J/g183 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Same in both: Castability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 4.2 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 80%
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-45100-T4 vs EN AC-45100-T6 — frequently asked
Is EN AC-45100-T6 stronger than EN AC-45100-T4?
Yes. EN AC-45100-T6 has a typical yield strength of 215 MPa (31.2 ksi) against 115 MPa (16.7 ksi) for EN AC-45100-T4 — about 87% more. Tensile strength is 260 MPa (37.7 ksi) vs 230 MPa (33.4 ksi).
Which condition does FabDigit quote by default, T4 or T6?
T6 is the default EN AC-45100 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, EN AC-45100-T4 or EN AC-45100-T6?
EN AC-45100-T6. Its machinability rates very good (74/100) against good (68/100) for EN AC-45100-T4; for welding the order is EN AC-45100-T4 first (fair, 40/100) then EN AC-45100-T6 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in EN AC-45100-T4 and EN AC-45100-T6 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.