DuPont™ Vespel® SP-22

DuPont™ Vespel® SP-22 is widely used for:

  • Bearings
  • Thrust washers
  • Seal rings
  • Ferrules
  • Sleeves
  • Wear strips
  • Vanes

Performance Characteristics:

  • Enhanced resistance to friction and wear
  • Minimal thermal expansion
  • Maximum thermal conductivity
  • High temperature resistance
  • Improved dimensional and oxidative stability
  • Minimum elongation

Common Brands:

  • DuPont™ Vespel®



Authorized Distributor of DuPont™ Vespel Polyimide

DuPont™ Vespel® SP-22

Dimensionally stable with enhanced resistance to friction and wear

DuPont™ Vespel® SP-22 offers minimal thermal expansion and dimensional stability for design flexibility. It also provides enhanced resistance to wear and friction as well as oxidative stability. Available as custom parts or stock shapes. 

 

STANDARD SIZES
PLAQUE Dimensions:
10 in x 10 in
Thickness:
0.062 in – 2 in
ROD Outside Diameter:
0.125 in – 6 in
OPTIONS AVAILABLE
COLOR Dark Brown
GRADES Graphite-Filled

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Vespel® SP-22 is also available in bar.

 

Typical Properties OF DuPont™ Vespel® SP-22 Polyimide
  ASTM
Method
Units SP-22
40% Graphite
Mechanical
Tensile strength,
23°C (73°F)
D1708 / D638 MPa (kpsi) 51.7
(7.5)
Tensile strength,
260°C (500°F)
D1708 / D638 MPa (kpsi) 23.4
(3.4)
Elongation at break,
23°C (73°F)
D1708 / D638 % 3.0
Elongation at break,
260°C (500°F)
D1708 / D638 % 2.0
Flexural modulus,
23°C (73°F)
D790 MPa (kpsi) 4,830
(700)
Flexural modulus,
260°C (500°F)
D790 MPa (kpsi) 2,760
(400)
Compressive stress at
10% strain, 23°C (73°F)
D695 MPa (kpsi) 112
(16.3)
Deformation under
13.8 MPa (2,000 psi) load
D621 % 0.08
Friction      
Coefficient of friction at
PV = .875 MPa m/s
(25,000 psi-ft/min)*
    0.20
Coefficient of friction at 
PV = 3.5 MPa m/s
(25,000 psi-ft/min)*
    0.09
Static coefficient
of friction in air*
    0.27
PV limit (unlubricated)**   MPa-m/s
(kpsi ft/min)
12.3
(350)
Other Properties      
Coefficient of thermal
expansion
23–300°C (73–572°F)
E831 µm/m/K
(10-6 in/in-°F)
38 (21)
Hardness D785 Rockwell E 5–25
Water absorption,
24 hr at 23°C (73°F)
D570 % 0.14

*Versus carbon steel, steady state, unlubricated, in air, thrust bearing. **PV limits for any material vary with different combinations of pressure and velocity as well as other conditions.

Need more information about this material? Use our interactive plastic properties table

The information set forth herein is furnished free of charge and is based on technical data that DuPont believes to be reliable and falls within the normal range of properties. It is intended for use by persons having technical skill, at their own discretion and risk. This data should not be used to establish specification limits nor used alone as the basis of design. Handling precaution information is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any product, evaluation under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on patents.

Caution: Do not use DuPont materials in medical applications involving implantation in the human body or contact with internal body fluids or tissues unless the material has been provided from DuPont under a written contract that is consistent with DuPont policy regarding medical applications and expressly acknowledges the contemplated use. For further information, please contact your DuPont representative. You may also request a copy of DuPont POLICY Regarding Medical Applications H-50103 and DuPont CAUTION Regarding Medical Applications H-50102. Copyright© 2015 DuPont.