Extruded Acrylic Sheet vs PMMA-FR
Polymer · grade comparison
Extruded Acrylic Sheet and PMMA-FR are both polymer grades. Extruded Acrylic Sheet is the stronger of the two: yield strength 66 MPa (9.57 ksi) against 62 MPa (8.99 ksi) for PMMA-FR, about 6% more. On the shop floor, PMMA-FR machines more easily (very good vs good), Extruded Acrylic Sheet welds better (very good vs good), and Extruded Acrylic Sheet forms better (excellent vs good).
Extruded Acrylic SheetChoose it when strength drives the design, or when it will be welded.
PMMA-FRChoose it when the part is machined in volume.
Extruded Acrylic Sheet vs PMMA-FR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer 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 polymer 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.
Shear Modulus
Bulk Modulus
Poisson's Ratio
Yield Strength (0.2% offset)
Compressive Strength
Flexural Strength
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Hardness, Rockwell R
Same in both: Elastic (Young's) Modulus 3.1 GPa0.45 Msi · Tensile Strength (Ultimate) 68 MPa9.9 ksi · Elongation at Break 4.5% · Compressive Modulus 3 GPa0.44 Msi · Flexural Modulus 3.1 GPa0.45 Msi · Fracture Toughness (K_IC) 1.1 MPa·√m1 ksi·√in
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Light Transmission
Same in both: Water Absorption (24 h) 0.3% · Water Absorption (Saturation) 2% · Refractive Index 1.49
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Thermal Conductivity 0.19 W/m·K0.11 BTU/hr·ft·°F · Specific Heat Capacity 1,470 J/kg·K0.35 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 72 µm/m·K40 µin/in·°F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Dielectric Constant (1 MHz)
Surface Resistivity
Same in both: Electrical Resistivity 1×10¹³ Ω·m3.94×10²⁰ µΩ·in · Dielectric Strength 25 kV/mm635 V/mil · Dissipation Factor (1 MHz) 0.02 · Volume Resistivity 1×10¹⁵ Ω·cm · Comparative Tracking Index (CTI) 600 V
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
Melt Flow Rate
Same in both: Processing Melt Temperature (typ.) 235°C455 °F · Mold Temperature (typ.) 70°C158 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 105 MJ/kg45,142 BTU/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Same in both: Specific Stiffness (E / density) 2.6 MN·m/kg · Thermal Diffusivity 0.1 mm²/s · Thermal Shock Resistance Index 0
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | Extruded Acrylic Sheet | PMMA-FR |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Extruded Acrylic Sheet vs PMMA-FR — frequently asked
Is Extruded Acrylic Sheet stronger than PMMA-FR?
Yes. Extruded Acrylic Sheet has a typical yield strength of 66 MPa (9.57 ksi) against 62 MPa (8.99 ksi) for PMMA-FR — about 6% more. Tensile strength is 68 MPa (9.86 ksi) vs 68 MPa (9.86 ksi).
Which is cheaper, Extruded Acrylic Sheet or PMMA-FR?
Extruded Acrylic Sheet is the lower-cost material: it sits in the standard tier ($$) while PMMA-FR is premium ($$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Extruded Acrylic Sheet or PMMA-FR?
PMMA-FR. Its machinability rates very good (78/100) against good (65/100) for Extruded Acrylic Sheet; for welding the order is Extruded Acrylic Sheet first (very good, 70/100) then PMMA-FR (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Extruded Acrylic Sheet and PMMA-FR 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.