Aluminum AlSi10Mg Stress Relieved vs AlSi10Mg-T6
Aluminum · AlSi10Mg temper comparison
AlSi10Mg Stress Relieved and AlSi10Mg-T6 are two conditions of the same aluminum grade, AlSi10Mg: Stress Relieved versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. AlSi10Mg-T6 is the stronger of the two: yield strength 240 MPa (34.8 ksi) against 215 MPa (31.2 ksi) for AlSi10Mg Stress Relieved, about 12% more. In exchange, AlSi10Mg Stress Relieved is the more ductile: elongation 10% versus 8% for AlSi10Mg-T6, and AlSi10Mg-T6 is harder (112 HV vs 105 HV).
AlSi10Mg Stress RelievedChoose it when the part is bent, formed or impact-loaded.
AlSi10Mg-T6Choose it when strength drives the design.
AlSi10Mg Stress Relieved vs AlSi10Mg-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.
AlSi10Mg Stress RelievedAlSi10Mg-T6
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, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 70 GPa10.2 Msi · Shear Modulus 26.5 GPa3.8 Msi · Bulk Modulus 69 GPa10 Msi · Poisson's Ratio 0.33 · Compressive Strength 480 MPa69.6 ksi · Shear Strength 280 MPa40.6 ksi · Charpy V-Notch Impact (RT) 5 J3.7 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 2.67 g/cm³0.1 lb/in³ · Melting Point (Solidus) 557°C1,035 °F · Liquidus Temperature 596°C1,105 °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 µm/m·K11.7 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
Same in both: Electrical Resistivity 7.2×10⁻⁸ Ω·m2.83 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.83 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 50% · Weldability 60 / 100 · Formability (cold) 10 / 100 · Castability 92 / 100 · Brazeability / Solderability 30 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 240 MJ/kg103,182 BTU/lb · Embodied Carbon (primary production) 15 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 5%
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.
AlSi10Mg Stress Relieved vs AlSi10Mg-T6 — frequently asked
Is AlSi10Mg-T6 stronger than AlSi10Mg Stress Relieved?
Yes. AlSi10Mg-T6 has a typical yield strength of 240 MPa (34.8 ksi) against 215 MPa (31.2 ksi) for AlSi10Mg Stress Relieved — about 12% more. Tensile strength is 340 MPa (49.3 ksi) vs 345 MPa (50 ksi).
Which condition does FabDigit quote by default, Stress Relieved or T6?
As Printed is the default AlSi10Mg condition in the FabDigit quote flow (neither Stress Relieved nor T6). 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 AlSi10Mg Stress Relieved over AlSi10Mg-T6?
Pick AlSi10Mg Stress Relieved when the part is bent, formed or impact-loaded. Pick AlSi10Mg-T6 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AlSi10Mg Stress Relieved and AlSi10Mg-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.