A356/Al2O3/20p T5 vs A356/Al2O3/20p T7
Composite · A356/Al2O3/20p grade comparison
A356/Al2O3/20p T5 and A356/Al2O3/20p T7 are two grades of the same composite grade, A356/Al2O3/20p: T5 (cooled from hot working and artificially aged) versus T7 (solution heat treated and overaged (stabilized)). The chemistry is identical, so every difference below comes from the condition. A356/Al2O3/20p T7 is the stronger of the two: yield strength 245 MPa (35.5 ksi) against 205 MPa (29.7 ksi) for A356/Al2O3/20p T5, about 20% more; tensile strength follows at 290 MPa (42.1 ksi) vs 255 MPa (37 ksi). A356/Al2O3/20p T7 is the more ductile: elongation 1.2% versus 0.8% for A356/Al2O3/20p T5. A356/Al2O3/20p T7 runs hotter in service (230°C vs 200°C continuous).
A356/Al2O3/20p T7Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
A356/Al2O3/20p T5 vs A356/Al2O3/20p T7: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all composite 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 composite 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.
A356/Al2O3/20p T5A356/Al2O3/20p T7
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Flexural Strength
Shear Strength
Fracture Toughness (K_IC)
Same in both: Elastic (Young's) Modulus 98 GPa14.2 Msi · Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 92 GPa13.3 Msi · Poisson's Ratio 0.33 · Compressive Modulus 99 GPa14.4 Msi · Flexural Modulus 97 GPa14.1 Msi
Physical
Density and transition temperatures.
Same in both: Density 2.94 g/cm³0.11 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 880 J/kg·K0.21 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 17.5 µm/m·K9.7 µin/in·°F · Min Service Temperature -196°C-321 °F · Max Service Temperature (short-term) 300°C572 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 95 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Same in both: Machinability 22 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 210 MJ/kg90,284 BTU/lb · Embodied Carbon (primary production) 14 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 10%
Strength versus weight
Yield strength against density for every composite grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
A356/Al2O3/20p T5 vs A356/Al2O3/20p T7 — frequently asked
Is A356/Al2O3/20p T7 stronger than A356/Al2O3/20p T5?
Yes. A356/Al2O3/20p T7 has a typical yield strength of 245 MPa (35.5 ksi) against 205 MPa (29.7 ksi) for A356/Al2O3/20p T5 — about 20% more. Tensile strength is 290 MPa (42.1 ksi) vs 255 MPa (37 ksi).
Which grade does FabDigit quote by default, T5 or T7?
T6 is the default A356/Al2O3/20p condition in the FabDigit quote flow (neither T5 nor T7). 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 A356/Al2O3/20p T5 over A356/Al2O3/20p T7?
Pick A356/Al2O3/20p T7 when strength drives the design, or when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A356/Al2O3/20p T5 and A356/Al2O3/20p T7 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.