Aluminum AlSiC-9-F vs AlSiC-9-T6
Aluminum · AlSiC-9 temper comparison
AlSiC-9-F and AlSiC-9-T6 are two conditions of the same aluminum grade, AlSiC-9: F (as fabricated) versus T6 (solution heat treated and artificially aged). The chemistry is identical, so every difference below comes from the condition. AlSiC-9-T6 is the stronger of the two: yield strength 230 MPa (33.4 ksi) against 190 MPa (27.6 ksi) for AlSiC-9-F, about 21% more; tensile strength follows at 250 MPa (36.3 ksi) vs 210 MPa (30.5 ksi). In exchange, AlSiC-9-F is the more ductile: elongation 0.4% versus 0.3% for AlSiC-9-T6, and AlSiC-9-T6 is harder (245 HB vs 215 HB). AlSiC-9-F runs hotter in service (350°C vs 300°C continuous).
AlSiC-9-FChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
AlSiC-9-T6Choose it when strength drives the design.
AlSiC-9-F vs AlSiC-9-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
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, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 76 GPa11 Msi · Bulk Modulus 116 GPa16.8 Msi · Poisson's Ratio 0.23 · Hardness, Rockwell B 97 HRB
Physical
Density and transition temperatures.
Same in both: Density 3.01 g/cm³0.11 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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 750 J/kg·K0.18 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.5 µm/m·K4.7 µin/in·°F · Min Service Temperature -269°C-452 °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) -0.75 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 70 / 100 · Brazeability / Solderability 60 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 250 MJ/kg107,481 BTU/lb · Embodied Carbon (primary production) 18 kg CO₂/kg · Embodied Water 1,100 L/kg132 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.
AlSiC-9-F vs AlSiC-9-T6 — frequently asked
Is AlSiC-9-T6 stronger than AlSiC-9-F?
Yes. AlSiC-9-T6 has a typical yield strength of 230 MPa (33.4 ksi) against 190 MPa (27.6 ksi) for AlSiC-9-F — about 21% more. Tensile strength is 250 MPa (36.3 ksi) vs 210 MPa (30.5 ksi).
Which condition does FabDigit quote by default, F or T6?
F is the default AlSiC-9 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.
When should I choose AlSiC-9-F over AlSiC-9-T6?
Pick AlSiC-9-F when the part is bent, formed or impact-loaded, or when the part sees heat. Pick AlSiC-9-T6 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in AlSiC-9-F and AlSiC-9-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.