A359/SiC/20p vs B/6061Al
Composite · grade comparison
A359/SiC/20p and B/6061Al are both composite grades. B/6061Al is the stronger of the two: yield strength 950 MPa (138 ksi) against 310 MPa (45 ksi) for A359/SiC/20p, about 3.1 times as much; tensile strength follows at 1,380 MPa (200 ksi) vs 340 MPa (49.3 ksi). B/6061Al is the more ductile: elongation 0.75% versus 0.5% for A359/SiC/20p. B/6061Al is lighter (2.65 g/cm³ vs 2.77 g/cm³ for A359/SiC/20p) and B/6061Al is stiffer (210 GPa vs 98.6 GPa).
B/6061AlChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
A359/SiC/20p 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.
Same in both: Electrical Resistivity 6×10⁻⁸ Ω·m2.36 µΩ·in
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
Typical Recycled Content
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 | A359/SiC/20p | B/6061Al |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
A359/SiC/20p vs B/6061Al — frequently asked
Is B/6061Al stronger than A359/SiC/20p?
Yes. B/6061Al has a typical yield strength of 950 MPa (138 ksi) against 310 MPa (45 ksi) for A359/SiC/20p — about 3.1 times as much. Tensile strength is 1,380 MPa (200 ksi) vs 340 MPa (49.3 ksi).
Which is cheaper, A359/SiC/20p or B/6061Al?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose A359/SiC/20p over B/6061Al?
Pick B/6061Al 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 A359/SiC/20p 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.