2124/SiC/25p T4 vs 2124/SiC/25p T8
Composite · 2124/SiC/25p grade comparison
2124/SiC/25p T4 and 2124/SiC/25p T8 are two grades of the same composite grade, 2124/SiC/25p: T4 (solution heat treated and naturally aged) versus T8 (solution heat treated, cold worked and artificially aged). The chemistry is identical, so every difference below comes from the condition. 2124/SiC/25p T8 is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 400 MPa (58 ksi) for 2124/SiC/25p T4, about 43% more; tensile strength follows at 660 MPa (95.7 ksi) vs 560 MPa (81.2 ksi). In exchange, 2124/SiC/25p T4 is the more ductile: elongation 5% versus 2% for 2124/SiC/25p T8. 2124/SiC/25p T8 runs hotter in service (175°C vs 150°C continuous) and 2124/SiC/25p T8 conducts heat better (145 W/m·K vs 130 W/m·K).
2124/SiC/25p T4Choose it when the part is bent, formed or impact-loaded.
2124/SiC/25p T8Choose it when strength drives the design, or when the part sees heat.
2124/SiC/25p T4 vs 2124/SiC/25p T8: 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.
2124/SiC/25p T42124/SiC/25p T8
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 114 GPa16.5 Msi · Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 90 GPa13.1 Msi · Poisson's Ratio 0.29 · Compressive Modulus 116 GPa16.8 Msi · Flexural Modulus 114 GPa16.5 Msi
Physical
Density and transition temperatures.
Same in both: Density 2.88 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 830 J/kg·K0.2 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 15 µm/m·K8.3 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) 260 MJ/kg111,780 BTU/lb · Embodied Carbon (primary production) 18 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 0%
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.
2124/SiC/25p T4 vs 2124/SiC/25p T8 — frequently asked
Is 2124/SiC/25p T8 stronger than 2124/SiC/25p T4?
Yes. 2124/SiC/25p T8 has a typical yield strength of 570 MPa (82.7 ksi) against 400 MPa (58 ksi) for 2124/SiC/25p T4 — about 43% more. Tensile strength is 660 MPa (95.7 ksi) vs 560 MPa (81.2 ksi).
Which grade does FabDigit quote by default, T4 or T8?
T6 is the default 2124/SiC/25p condition in the FabDigit quote flow (neither T4 nor T8). 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 2124/SiC/25p T4 over 2124/SiC/25p T8?
Pick 2124/SiC/25p T4 when the part is bent, formed or impact-loaded. Pick 2124/SiC/25p T8 when strength drives the design, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2124/SiC/25p T4 and 2124/SiC/25p T8 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.