PEISheetNatural
Ultem 1000 (PEI) - 0.375" 12 x 48 Natural Sheet
0.375 in × 12 in × 48 in Sheet
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About This Product
Ultem 1000 (PEI) Natural Sheet is a high-performance Polyetherimide sheet measuring 0.375" thick and 48" length, ideal for demanding electrical, aerospace, and industrial applications. Known for excellent heat deflection, strong dimensional stability, and inherent flame resistance, this Natural PEI sheet delivers reliable performance where strength and elevated-temperature capability matter.
Specifications
Resin
Ultem 1000
Shape
Sheet
Thickness
0.375 inPrice
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In Stock
21010 availableAvailable at 11 locations
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Typical Properties — Ultem 1000 (PEI) - 0.375" 12 x 48 Natural Sheet
PeiGeneral
PropertyTest MethodUnitValue
DensityD792lb/in³ / g/cm³0.046 / 1.2
Water absorption (24 / 96 h immersion @ 73°F)ASTM D570mg / %20/41 / 0.26/0.54
Water absorption (Saturation in air @ 73°F, 50% RH)ASTM D570%0.75
Water absorption (Saturation in water @ 73°F)ASTM D570%1.35
Flammability rating (UL 94, 3 / 6 mm thickness)UL 94V-0/V-0
Mechanical
PropertyTest MethodUnitValue
Tensile strength (At yield / break)ASTM D638psi / MPa15,250 / 105
Tensile strain at breakASTM D638%10
Tensile modulusASTM D638psi / MPa493,000 / 3,300
Compressive stress (At 10% nominal strain)ASTM D695psi / MPa22,000 / 150
Rockwell hardnessASTM D785R126
Operating Environment
PropertyTest MethodUnitValue
Thermal conductivity (@ 73°F)ASTM C177Btu·in/ft²·h·°F / W/m·K1.5 / 0.21
Coefficient of thermal expansion (Avg. 73 – 140°F)ASTM D696μin/in/°F / μm/m/°C25 / 45
Coefficient of thermal expansion (Avg. 73 – 212°F)ASTM D696μin/in/°F / μm/m/°C25 / 45
Heat deflection temperature (264 psi (Method A))ASTM D648°F / °C375 / 190
Max service temperature (Short-term)°F / °C390 / 195
Max service temperature (Continuous (5,000 / 20,000 h))°F / °C340 / 170
Electrical
PropertyTest MethodUnitValue
Dielectric strengthASTM D149V/mil / kV/mm685 / 26
Volume resistivityASTM D257Ω·cm>10¹⁴
Surface resistivityASTM D257Ω>10¹³
Typical properties are provided for reference only. Values may vary based on processing conditions, form factor, and lot. Contact Ready Plastics for certified test data.