A359/SiC/20p vs P100Gr/6061Al
Composite · grade comparison
A359/SiC/20p and P100Gr/6061Al are both composite grades. P100Gr/6061Al is the stronger of the two: tensile strength 620 MPa (89.9 ksi) against 340 MPa (49.3 ksi) for A359/SiC/20p, about 82% more. In exchange, A359/SiC/20p is the more ductile: elongation 0.5% versus 0.3% for P100Gr/6061Al. P100Gr/6061Al is lighter (2.5 g/cm³ vs 2.77 g/cm³ for A359/SiC/20p) and P100Gr/6061Al is stiffer (320 GPa vs 98.6 GPa).
A359/SiC/20pChoose it when the part is bent, formed or impact-loaded.
P100Gr/6061AlChoose it when strength drives the design, or when weight is the constraint.
A359/SiC/20p vs P100Gr/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)
Min Service Temperature
Max Service Temperature (short-term)
Electrical
Conductivity and insulation.
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Polishability
Same in both: Machinability 12 / 100
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)
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 | P100Gr/6061Al |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
A359/SiC/20p vs P100Gr/6061Al — frequently asked
Is P100Gr/6061Al stronger than A359/SiC/20p?
Yes. P100Gr/6061Al has a typical tensile strength of 620 MPa (89.9 ksi) against 340 MPa (49.3 ksi) for A359/SiC/20p — about 82% more.
Which is cheaper, A359/SiC/20p or P100Gr/6061Al?
Both sit in the same relative cost tier ($$$$, 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 P100Gr/6061Al?
Pick A359/SiC/20p when the part is bent, formed or impact-loaded. Pick P100Gr/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 A359/SiC/20p and P100Gr/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.