Aluminum AlSi7Mg0.6-T5 vs AlSi7Mg0.6-T61
Aluminum · AlSi7Mg0.6 temper comparison
AlSi7Mg0.6-T5 and AlSi7Mg0.6-T61 are two conditions of the same aluminum grade, AlSi7Mg0.6: 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. AlSi7Mg0.6-T5 is the stronger of the two: yield strength 300 MPa (43.5 ksi) against 255 MPa (37 ksi) for AlSi7Mg0.6-T61, about 18% more; tensile strength follows at 420 MPa (60.9 ksi) vs 330 MPa (47.9 ksi). In exchange, AlSi7Mg0.6-T61 is the more ductile: elongation 13% versus 6% for AlSi7Mg0.6-T5, and AlSi7Mg0.6-T5 is harder (115 HB vs 96 HB). AlSi7Mg0.6-T61 runs hotter in service (175°C vs 150°C continuous) and AlSi7Mg0.6-T61 conducts heat better (160 W/m·K vs 135 W/m·K).
AlSi7Mg0.6-T5Choose it when strength drives the design.
AlSi7Mg0.6-T61Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
AlSi7Mg0.6-T5 vs AlSi7Mg0.6-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 72 GPa10.4 Msi · Shear Modulus 27 GPa3.9 Msi · Bulk Modulus 71 GPa10.3 Msi · Poisson's Ratio 0.33 · Compressive Strength 290 MPa42.1 ksi · Shear Strength 230 MPa33.4 ksi · Charpy V-Notch Impact (RT) 5 J3.7 ft·lbf · Hardness, Rockwell B 63 HRB
Physical
Density and transition temperatures.
Same in both: Density 2.67 g/cm³0.1 lb/in³ · Melting Point (Solidus) 555°C1,031 °F · Liquidus Temperature 613°C1,135 °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 900 J/kg·K0.21 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
Same in both: Electrical Resistivity 4.4×10⁻⁸ Ω·m1.73 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.83 V · Corrosion Resistance 58 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 70% · Weldability 65 / 100 · Formability (cold) 20 / 100 · Castability 92 / 100 · Brazeability / Solderability 40 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 215 MJ/kg92,433 BTU/lb · Embodied Carbon (primary production) 13.5 kg CO₂/kg · Embodied Water 1,150 L/kg138 gal/lb · Typical Recycled Content 10%
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.
AlSi7Mg0.6-T5 vs AlSi7Mg0.6-T61 — frequently asked
Is AlSi7Mg0.6-T5 stronger than AlSi7Mg0.6-T61?
Yes. AlSi7Mg0.6-T5 has a typical yield strength of 300 MPa (43.5 ksi) against 255 MPa (37 ksi) for AlSi7Mg0.6-T61 — about 18% more. Tensile strength is 420 MPa (60.9 ksi) vs 330 MPa (47.9 ksi).
Which condition does FabDigit quote by default, T5 or T61?
T6 is the default AlSi7Mg0.6 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.
When should I choose AlSi7Mg0.6-T5 over AlSi7Mg0.6-T61?
Pick AlSi7Mg0.6-T5 when strength drives the design. Pick AlSi7Mg0.6-T61 when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AlSi7Mg0.6-T5 and AlSi7Mg0.6-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.