2124/SiC/25p vs B/6061Al
Composite · grade comparison
2124/SiC/25p and B/6061Al are both composite grades. B/6061Al is the stronger of the two: yield strength 950 MPa (138 ksi) against 480 MPa (69.6 ksi) for 2124/SiC/25p, about 98% more; tensile strength follows at 1,380 MPa (200 ksi) vs 620 MPa (89.9 ksi). In exchange, 2124/SiC/25p is the more ductile: elongation 3% versus 0.75% for B/6061Al. B/6061Al is lighter (2.65 g/cm³ vs 2.88 g/cm³ for 2124/SiC/25p) and B/6061Al is stiffer (210 GPa vs 114 GPa).
2124/SiC/25pChoose it when the part is bent, formed or impact-loaded.
B/6061AlChoose it when strength drives the design, or when weight is the constraint.
2124/SiC/25p vs B/6061Al: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Physical
Density and transition temperatures.
Density
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Max Service Temperature (short-term)
Same in both: Min Service Temperature -196°C-321 °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
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | 2124/SiC/25p | B/6061Al |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
2124/SiC/25p vs B/6061Al — frequently asked
Is B/6061Al stronger than 2124/SiC/25p?
Yes. B/6061Al has a typical yield strength of 950 MPa (138 ksi) against 480 MPa (69.6 ksi) for 2124/SiC/25p — about 98% more. Tensile strength is 1,380 MPa (200 ksi) vs 620 MPa (89.9 ksi).
Which is cheaper, 2124/SiC/25p or B/6061Al?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose 2124/SiC/25p over B/6061Al?
Pick 2124/SiC/25p when the part is bent, formed or impact-loaded. Pick B/6061Al when strength drives the design, or when weight is the constraint.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2124/SiC/25p and B/6061Al 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.