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Elmet Technologies

General Plastics LAST-A-FOAM® FR-4550 High Density, Rigid Foam
Categories: Other Engineering Material

Material Notes: Product Description: LAST-A-FOAM® high-density, rigid foam products are cost-effective, versatile, strong and durable. They are manufactured using our unique chemical formulas to be exceptionally uniform and consistent in all physical properties. The FR-4500 is a grain-free, machineable tooling board for styling and design models, master models, masters for composite and layup tools, and for mold and foundry patterns. The material also serves as an excellent wood alternative for outdoor signage and display manufacturing. Available in densities from 10 to 50 lbs. per cubic foot.

Key Performance Benefits:

  • Special formulation creates shavings when material is machined, causing less dust
  • Excellent consistency and uniformity throughout entire mass of material
  • Dimensional stability
  • No warp or bow in sheets
  • Large sheets (up to 48” x 96”), thick sheets (up to 22”) available
  • Custom sizes available
Applications:
  • Design prototypes
  • Appearance or “sight” models
  • Styling models
  • Architectural models
  • Master models
  • Temporary models
  • Trim, jigs, and fixtures
  • Thermoforming tools
  • Prototype foundry patterns
  • Mold patterns
  • Topographical maps
  • Dimensional check-fixtures
  • Molds for low-temperature casting (<200 ºF)
  • Prototype/low-volume Vacuum-forming tools
  • CAD model proofs/NC program proofs
  • Tooling aids
  • Molds for low-temperature curing prepregs (<200 ºF)

Information provided by General Plastics Manufacturing Company

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 0.801 g/cc0.0289 lb/in³ASTM D1622
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 7979ASTM D2240
Tensile Strength 21.13 MPa3064 psiPerpendicular to Rise; ASTM D1623
 21.39 MPa3102 psiParallel to Rise; ASTM D1623
 27.14 MPa3936 psiASTM D1623
Flexural Strength 33.12 MPa4804 psiRise Parallel to Test Span; ASTM D790 Method 1-A
 33.83 MPa4907 psiRise Parallel to Beam Thick.; ASTM D790 Method 1-A
 38.02 MPa5514 psiASTM D790
Flexural Modulus 1.15569 GPa167.619 ksiRise Parallel to Beam Thick.; ASTM D790 Method 1-A
 1.17729 GPa170.752 ksiRise Parallel to Test Span; ASTM D790 Method 1-A
 1.45388 GPa210.868 ksiASTM D790
Compressive Strength 39.27 MPa5696 psiASTM D1621
 19.35 MPa
@Temperature 71.1 °C
2806 psi
@Temperature 160 °F
Parallel to Rise; ASTM D1621
 20.88 MPa
@Temperature 71.1 °C
3028 psi
@Temperature 160 °F
Perpendicular to Rise; ASTM D1621
 31.12 MPa
@Temperature 23.9 °C
4514 psi
@Temperature 75.0 °F
Parallel to Rise; ASTM D1621
 33.76 MPa
@Temperature 23.9 °C
4896 psi
@Temperature 75.0 °F
Perpendicular to Rise; ASTM D1621
Compressive Modulus 1.66801 GPa241.925 ksiASTM D1621
 0.53039 GPa
@Temperature 71.1 °C
76.927 ksi
@Temperature 160 °F
Parallel to Rise; ASTM D1621
 0.54280 GPa
@Temperature 71.1 °C
78.726 ksi
@Temperature 160 °F
Perpendicular to Rise; ASTM D1621
 0.57489 GPa
@Temperature 23.9 °C
83.381 ksi
@Temperature 75.0 °F
Parallel to Rise; ASTM D1621
 0.61265 GPa
@Temperature 23.9 °C
88.858 ksi
@Temperature 75.0 °F
Perpendicular to Rise; ASTM D1621
Poissons Ratio 0.300.30
Shear Modulus 0.54986 GPa79.751 ksiASTM C273
Shear Strength 17.62 MPa2555 psiASTM C273
 
Thermal PropertiesMetricEnglishComments
CTE, linear 52.2 µm/m-°C
@Temperature -45.6 - 93.3 °C
29.0 µin/in-°F
@Temperature -50.0 - 200 °F
GP Method
Thermal Conductivity 0.130 W/m-K0.904 BTU-in/hr-ft²-°FASTM C518
Glass Transition Temp, Tg 103 °C217 °FASTM E1545-05
 
Descriptive Properties
ColorGray-Green
Surface Roughness128sanded, SJ-201P per JIS B0601-1982
Tumbling Friability (%)0.0120 mins at 60 rpm, ASTM C421

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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