A359/SiC/20p T6 vs A359/SiC/20p T71
Composite · A359/SiC/20p grade comparison
A359/SiC/20p T6 and A359/SiC/20p T71 are two grades of the same composite grade, A359/SiC/20p: T6 (solution heat treated and artificially aged) versus T71 (solution treated and overaged). The chemistry is identical, so every difference below comes from the condition. A359/SiC/20p T6 is the stronger of the two: yield strength 310 MPa (45 ksi) against 255 MPa (37 ksi) for A359/SiC/20p T71, about 22% more; tensile strength follows at 340 MPa (49.3 ksi) vs 290 MPa (42.1 ksi). In exchange, A359/SiC/20p T71 is the more ductile: elongation 0.8% versus 0.5% for A359/SiC/20p T6. A359/SiC/20p T71 runs hotter in service (230°C vs 200°C continuous).
A359/SiC/20p T6Choose it when strength drives the design.
A359/SiC/20p T71Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
A359/SiC/20p T6 vs A359/SiC/20p T71: 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.
A359/SiC/20p T6A359/SiC/20p T71
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 98.6 GPa14.3 Msi · Shear Modulus 38 GPa5.5 Msi · Bulk Modulus 82 GPa11.9 Msi · Poisson's Ratio 0.32 · Compressive Modulus 99 GPa14.4 Msi · Flexural Modulus 98 GPa14.2 Msi
Physical
Density and transition temperatures.
Same in both: Density 2.77 g/cm³0.1 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 840 J/kg·K0.2 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.
Machinability
Same in both: Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 190 MJ/kg81,685 BTU/lb · Embodied Carbon (primary production) 13 kg CO₂/kg · Embodied Water 1,100 L/kg132 gal/lb · Typical Recycled Content 15%
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.
A359/SiC/20p T6 vs A359/SiC/20p T71 — frequently asked
Is A359/SiC/20p T6 stronger than A359/SiC/20p T71?
Yes. A359/SiC/20p T6 has a typical yield strength of 310 MPa (45 ksi) against 255 MPa (37 ksi) for A359/SiC/20p T71 — about 22% more. Tensile strength is 340 MPa (49.3 ksi) vs 290 MPa (42.1 ksi).
Which grade does FabDigit quote by default, T6 or T71?
T6 is the default A359/SiC/20p 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 A359/SiC/20p T6 over A359/SiC/20p T71?
Pick A359/SiC/20p T6 when strength drives the design. Pick A359/SiC/20p T71 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 A359/SiC/20p T6 and A359/SiC/20p T71 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.