2124/SiC/25p vs W75Cu25
Composite · grade comparison
2124/SiC/25p and W75Cu25 are both composite grades. 2124/SiC/25p is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 380 MPa (55.1 ksi) for W75Cu25, about 26% more. In exchange, W75Cu25 is the more ductile: elongation 5% versus 3% for 2124/SiC/25p. 2124/SiC/25p is lighter (2.88 g/cm³ vs 14.8 g/cm³ for W75Cu25) and W75Cu25 is stiffer (250 GPa vs 114 GPa). On the shop floor, W75Cu25 machines more easily (poor vs not recommended).
2124/SiC/25pChoose it when strength drives the design, or when weight is the constraint.
W75Cu25Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
2124/SiC/25p vs W75Cu25: 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
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Modulus
Shear Strength
Same in both: Tensile Strength (Ultimate) 620 MPa89.9 ksi · Flexural Strength 800 MPa116 ksi · Fracture Toughness (K_IC) 15 MPa·√m13.7 ksi·√in
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
Volume 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.
Machinability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 18 kg CO₂/kg
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 | W75Cu25 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
2124/SiC/25p vs W75Cu25 — frequently asked
Is 2124/SiC/25p stronger than W75Cu25?
Yes. 2124/SiC/25p has a typical yield strength of 480 MPa (69.6 ksi) against 380 MPa (55.1 ksi) for W75Cu25 — about 26% more. Tensile strength is 620 MPa (89.9 ksi) vs 620 MPa (89.9 ksi).
Which is cheaper, 2124/SiC/25p or W75Cu25?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 2124/SiC/25p or W75Cu25?
W75Cu25. Its machinability rates poor (30/100) against not recommended (12/100) for 2124/SiC/25p.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 2124/SiC/25p and W75Cu25 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.