Superimide® SM-438 is a high temperature, high strength, polyimide resin composite system designed for service in extreme conditions such as jet engine and industrial heavy machinery. SM-438 must be considered for temperatures up to 650°F (343°C) when strength is your primary design concern.

Fully certified components made from Superimide® SM-438 are available exclusively from Maverick Molding Company.

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Key Features

  • Wear at Temperature
  • Strength
  • CTE

Typical Properties

Mechanical PropertiesTemperatureTest MethodUnitsTypical Values
Tensile StrengthRTASTM D638Ksi17.5
Tensile ModulusRTASTM D638Msi1.5
Tensile Elongation @ BreakRTASTM D638%1.3
Tensile Strength500°F (260°C)ASTM D638Ksi6.1
Tensile Modulus500°F (260°C)ASTM D638Msi-
Tensile Elongation @ Break500°F (260°C)ASTM D638%1.2
Compressive StrengthRTASTM D695Ksi51
Compressive ModulusRTASTM D695Msi1.95
Compressive Strength500°F (260°C)ASTM D695Ksi32
Compressive Modulus500°F (260°C)ASTM D695Msi1.1
Shear StrengthRTASTM D5379Ksi7.5
Shear ModulusRTASTM D5379Msi-
Flexural StrengthRTASTM D790Ksi25
Flexural ModulusRTASTM D790Msi1.7
Flexural Strength500°F (260°C)ASTM D790Ksi11.5
Flexural Modulus500°F (260°C)ASTM D790Msi0.57
Physical PropertiesTemperatureTest MethodUnitsTypical Values
 Density RT ASTM D792 (g/cm^3) 1.52
 Poisson's Ratio RT ASTM D638 - 0.23
 Hardness, Rockwell “E” RT ASTM D785 - 100
 Dry Tg  RT – 750°F ASTM E1640 °F (°C) 644 (340)
 Wet Tg RT – 750°F ASTM E1640 °F (°C) 545 (285)
 Moisture Absorption RT - -
CTE Parallel to Molding DirectionRT to 450°FASTM E831In-inE-6/°F22
CTE Transverse to Molding DirectionRT to 450°FASTM E831In-inE-6/°F11
TOS Wt. Loss (100 hrs, 70 psi)700°F (371°C)E50TF534-5.2
TOS Wt. Loss (120 hrs, 150 psi)600°F (316°C)E50TF534-2.3
Wear PropertiesTemperatureTest MethodUnitsTypical Values
Coefficient of FrictionRT to 700°FASTM G99-0.25
Wear @ 30N Load/500 rpm/2 hours400°F (205°C)ASTM G99µm8
Wear @ 30N Load/500 rpm/2 hours500°F (260°C)ASTM G99µm75
Thermal ConductivityRTASTM E1225-04BTU/Hrs.ft°F0.76
Thermal Conductivity662°F (350°C)ASTM E1225-05BTU/Hrs.ft°F1.05
Specific Heat CapacityRTASTM E1269-05W/mK1.35
Specific Heat Capacity662°F (350°C)ASTM E1269-06J/kg°C1.86

Disclaimer: The data listed herein fall within the normal range of properties but should not be used to establish specification limits or used alone as the basis of design. Maverick Molding assumes no obligations or liabilities for any advice furnished or for any results obtained with respect to this information. All such advice is given and accepted at buyer’s risk.

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