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Semitron® MP 370 High Strength
Test Socket Material Specifications

904 West 6th Street, Shiner, Texas 77984 USA
Phone: 1-361-594-2941     Fax: 1-361-594-2349     E-Mail:


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click to resize photo Semitron® MP370 was developed to offer new material options for the design and manufacture of precision test sockets for the semiconductor manufacturing industry. It offers significant performance advantages over unfilled PEEK while maintaining the moisture resistance and high thermal performance that makes PEEK an attractive material choice.

Specifically, Semitron MP370 gives the designer a machinable platform that has enhanced thermal resistance, toughness and higher strength performance versus unfilled PEEK. This custom formulation offers the next level of performance without the failings of injection molded blanks (high internal stress, inconsistent properties) or traditional ceramic-filled materials (poor machinability).

Semitron® MP370 is  WHITE  in color and available in several thicknesses of sheet or plate only.

( see also Semitron MDS 100 Specifications )

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ASTM or UL test Property Semitron® MP-370
D792 Density (lb/in³)
D570 Water Absorption, 24 hrs (% by wt) 0.11
D570 Water Absorption, saturation (% by wt) 0.50
D638 Tensile Strength (psi) 11,500
D638 Tensile Modulus (psi) 640,000
D638 Tensile Elongation at Break (%) 3
D790 Flexural Strength (psi) 16,750
D790 Flexural Modulus (psi) 625,000
D695 Compressive Strength (psi) 18,200
D695 Compressive Modulus (psi) 600,000
D785 Hardness, Rockwell M98
D256 IZOD Notched Impact (ft-lb/in) 0.4
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
D648 Heat Deflection Temp (°F / °C)
at 264 psi

300 / 149
D3418 Glass Transition Temp (°F / °C) 320 / 160
- Max Operating Temp (°F / °C) 480 / 249
C177 Thermal Conductivity
(x 10-4 cal/cm-sec-°C)

UL94 Flammability Rating V-0
D149 Dielectric Strength (V/mil) short time, 1/8" thick 376
D150 Dielectric Constant at 1 MHz 4.13
D150 Dissipation Factor at 1 MHz 0.004
EOS/ESD S11.11 Surface Resistivity (ohms/square) > 1013
EOS/ESD S11.11 Volume Resistivity (ohms-cm) > 1015

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.
All values at 73°F (23°C) unless otherwise noted.
SEMITRON is a registered trademark of Quadrant Engineering Plastic Products.

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Boedeker Plastics, Inc.
904 West 6th Street, Shiner, Texas 77984 USA
USA TOLLFREE : 1-800-444-3485
Phone: 1-361-594-2941     Fax: 1-361-594-2349     E-Mail:

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