Vespel® SP-211

Vespel® S polyimide family of parts and shapes with differing sets of attributes The Vespel® S Family of products are highly durable polyimides and are used in demanding applications where exceptional thermal resistance, low wear and/or low friction, strength and impact resistance are desired.

DuPont™ Vespel® SP-211 parts and shapes have a low coefficient of friction over a wide range of operating conditions. It exhibits low wear rates up to 300 °C (572 °F). SP-211 is a filled polymer.

Available Sizes

Electrical Property

Dissipation Factor at 102 Hz at 104 Hz at 106 Hz

D150

—

Dielectric Strength, Short Time 2 mm Thick

D149

MV/m

—

Volume Resistivity

D257

Ω·m

—

Surface Resistivity

D257

Ω

—

Dielectric Constant at 102 Hz at 104 Hz at 106 Hz

D150

—

Other Property

Oxygen Index

D2863

—

Specific Gravity

D792

—

1.55

Water Absorption 24 h 48 h Equilibrium, 50% RH

D570

0.21 0.49 —

Thermal Property

Specific Heat

—

J/kg/°C

—

Deformation Under 14 MPa Load

D-621

0.13

Thermal Conductivity

—

W/m·°C

0.76

Deflection Temperature at 2 MPa

D-648

°C

—

Coefficient of Linear Expansion

D-696

µm/m/°C (in/in/°F)

54 (30)

Mechanical Property

Flexural Strength

D-790

MPa (kpsi)

68.9 (10.0) 34.5 (5.0)

Poisson’s Ratio

—

Flexural Modulus

D-790

MPa (kpsi)

3102 (450) 1379 (200)

Compressive Stress at 1% strain at 10% strain at 0.1% offset

D-695

MPa (kpsi)

20.7 (3.0) 102.0 (14.8) 37.2 (5.4)

Axial Fatigue, Endurance Limit at 103 cycles at 107 cycles

—

MPa (kpsi)

—

Shear Strength

D-732

MPa (kpsi)

—

Strain at Break

D-1708 or E8 †

3.5 3.0

Izod Unotched Impact Strength

D-256

J/m

—

Compressive Modulus

D-695

MPa (kpsi)

2068 (300)

Tensile Strength

D-1708 or E8 †

MPa (kpsi)

44.8 (6.5) 24.1 (3.5)

Izod Notched Impact Strength

D-256

J/m

—

Flexural Fatigue, Endurance Limit at 103 cycles at 107 cycles

—

MPa (kpsi)

—

Wear and Friction Property

Wear Rate††

—

m/s x 10-10

4.9

In Vacuum

—

Static in Air

—

0.2

Friction Coefficient** PV = 0.875 MPa·m/s PV = 3.5 MPa·m/s

—

0.12 0.08

Technical Resources

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