Aluminum Composite Panel (ACM) vs EPS Foam Core
Composite · grade comparison
Aluminum Composite Panel (ACM) and EPS Foam Core are both composite grades. Aluminum Composite Panel (ACM) is the stronger of the two: tensile strength 130 MPa (18.9 ksi) against 0.25 MPa (0.0363 ksi) for EPS Foam Core, about 520 times as much. Aluminum Composite Panel (ACM) is the more ductile: elongation 5% versus 3.5% for EPS Foam Core. EPS Foam Core is lighter (0.02 g/cm³ vs 1.35 g/cm³ for Aluminum Composite Panel (ACM)) and Aluminum Composite Panel (ACM) is stiffer (70 GPa vs 0.01 GPa).
Aluminum Composite Panel (ACM)Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
EPS Foam CoreChoose it when weight is the constraint.
Aluminum Composite Panel (ACM) vs EPS Foam Core: 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.
Aluminum Composite Panel (ACM)EPS Foam Core
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Modulus
Poisson's Ratio
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Compression Set (22 h, 70 °C)
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Specific Heat Capacity
Limiting Oxygen Index
Max Service Temperature (short-term)
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
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
Weldability
Formability (cold)
Polishability
Mold Shrinkage
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)
Same in both: Thermal Shock Resistance Index 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.
Manufacturing and finishing
| Capability | Aluminum Composite Panel (ACM) | EPS Foam Core |
|---|---|---|
| Sheet metal | Yes | — |
| Default condition | PE Core | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
| Painting | Yes | — |
Aluminum Composite Panel (ACM) vs EPS Foam Core — frequently asked
Is Aluminum Composite Panel (ACM) stronger than EPS Foam Core?
Yes. Aluminum Composite Panel (ACM) has a typical tensile strength of 130 MPa (18.9 ksi) against 0.25 MPa (0.0363 ksi) for EPS Foam Core — about 520 times as much.
Which is cheaper, Aluminum Composite Panel (ACM) or EPS Foam Core?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Aluminum Composite Panel (ACM) or EPS Foam Core?
EPS Foam Core. Its machinability rates excellent (85/100) against very good (80/100) for Aluminum Composite Panel (ACM).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Aluminum Composite Panel (ACM) and EPS Foam Core 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.