DuPont™ Vespel® Polyimide

DuPont™ Vespel® is Widely Used For:

  • Semiconductor and material handling machinery
  • Chip test sockets
  • Wafer clamping rings
  • Valve seats and sealing applications
  • Spline couplings
  • High performance bearings and bushings
  • Locking fasteners for aerospace
  • Pivot bushings on unison ring

Performance Characteristics:

  • Long term performance at temperatures
    up to 260°C (500°F)
  • Outstanding sealing characteristics when mated against metals
  • Excellent unlubricated bearing and wear properties (bearing grades)
  • Good electrical insulating properties
    (unfilled grades)

Common Brands:

  • DuPont™ Vespel®


Authorized Distributor of DuPont™ Vespel Polyimide

DuPont™ Vespel® Polyimide

Extremely high temperature creep resistant plastic with excellent friction and wear characteristics

DuPont™ Vespel® Polyimide is an extremely high temperature, creep resistant plastic material that is often used in high heat environments where thermoplastic materials lose their mechanical properties. Vespel®, a lightweight alternative to metal, is available in a variety of formulations including unfilled grades and several low friction and wear grades.

Shop for DuPont™ Vespel®

 

STANDARD SIZES
PLAQUE Dimensions:
5 in x 5 in – 10 in x 10 in
Thickness:
0.062 in – 2 in
ROD Outside Diameter:
0.125 in – 6 in
OPTIONS AVAILABLE
COLOR Brown, Dark Brown
GRADES Unfilled, Bearing Grade, Graphite-Filled

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Unfilled Vespel® formulations are also available in Balls and Tubes.


DUPONT VESPEL® POLYIMIDE MATERIAL OPTIONS

The Vespel® SP Family of products are highly durable polyimides used in demanding applications where exceptional thermal resistance, low wear and/or low friction, strength and impact resistance are desired.

SP-1– Unfilled offers superior wear and insulation properties with operating temperatures from cryogenic to 260°C (500°F). Low electrical conductivity. Highest elongation and purity of SP family. Available as stock shapes.

SP-21– Graphite-enhanced with low-friction properties for use with or without lubrication in various applications. Available as custom parts or stock shapes.

SP-211– Lower coefficient of friction than SP-21 without lubrication in various applications. Available as custom parts or stock shapes.

SP-22– Minimal thermal expansion and dimensional stability for design flexibility. Available as custom parts or stock shapes.

SP-3– Used in vacuum and dry environments with low outgassing. Available as stock shapes.   

 

The Vespel® SCP Family exhibits enhanced mechanical properties and superior thermal stability.

SCP-5000– Unfilled grade with enhanced mechanical properties and thermal stability. 

SCP-5009– Bearing and wear grade with enhanced mechanical properties and thermal stability.

SCP-50094– Highest tensile strength bearing and wear grade with enhanced thermal stability. 

SCP-5050– Bearing and wear grade with extremely low COF, low CTE, and enhanced thermal stability.

Tech Tip– Vespel® material and its properties offer superior performance in high pressure, high temperature, and low temperature sealing applications.

 

Typical Properties OF DuPont™ Vespel® Polyimide SP
      Vespel® SP
  ASTM
Method
Units SP-1
Unfilled
SP-21
15%
Graphite
SP-22
40%
Graphite
SP-211
15%
Graphite
and 10%
Teflon®
SP-3
15%
Vacuum
Bearing
Grade
Mechanical
Tensile strength,
23°C (73°F)
D1708 / D638 MPa (kpsi) 86.2
(12.5)
65.5
(9.5)
51.7
(7.5)
44.8
(6.5)
56.5
(8.2)
Tensile strength,
260°C (500°F)
D1708 / D638 MPa (kpsi) 41.4
(6.0)
37.9
(5.5)
23.4
(3.4)
24.1
(3.5)
 
Elongation at break,
23°C (73°F)
D1708 / D638 % 7.5 4.5 3.0 3.5 4.0
Elongation at break,
260°C (500°F)
D1708 / D638 % 6.0 3.0 2.0 3.0  
Flexural modulus,
23°C (73°F)
D790 MPa (kpsi) 3,100
(450)
3,790
(550)
4,830
(700)
3,100
(450)
3,280
(475)
Flexural modulus,
260°C (500°F)
D790 MPa (kpsi) 1,720
(250)
2,550
(370)
2,760
(400)
1,380
(200)
1,860
(270)
Compressive stress at
10% strain, 23°C (73°F)
D695 MPa (kpsi) 133
(19.3)
133
(19.3)
112
(16.3)
102
(14.8)
128
(18.5)
Deformation under
13.8 MPa (2,000 psi) load
D621 % 0.14 0.10 0.08 0.13 0.12
Friction              
Coefficient of friction at
PV = .875 MPa m/s
(25,000 psi-ft/min)*
    0.29 0.24 0.20 0.12 0.25
Coefficient of friction at 
PV = 3.5 MPa m/s
(25,000 psi-ft/min)*
      0.12 0.09 0.08 0.17
Static coefficient
of friction in air*
    0.35 0.30 0.27 0.20  
PV limit (unlubricated)**   MPa-m/s
(kpsi ft/min)
  12.3
(350)
12.3
(350)
3.5
(100)
 
Other Properties              
Coefficient of thermal
expansion
23–300°C (73–572°F)
E831 µm/m/K
(10-6 in/in-°F)
54 (30) 49 (27) 38 (21) 54 (30) 52 (29)
Hardness D785 Rockwell E 45–60 25–45 5–25 1–20 40–55
Water absorption,
24 hr at 23°C (73°F)
D570 % 0.24 0.19 0.14 0.21 0.23

 

Typical Properties for DuPont™ Vespel® Polyimide SCP
      Vespel® SCP
  ASTM
Method
Units SCP-5000
Unfilled
SCP-5009
Graphite
Filled
SCP-50094
Graphite
Bearing
Grade–
Low fill
SCP-5050
Graphite
Bearing
Grade–
High fill
Mechanical
Tensile strength,
23°C (73°F)
D1708 / D638 MPa (kpsi) 163
(23.6)
116
(16.9)
124
(18.0)
72
(10.5)
Tensile strength,
260°C (500°F)
D1708 / D638 MPa (kpsi) 62
(9)
57
(8.4)
55
(8.0)
39
(5.6)
Elongation at break,
23°C (73°F)
D1708 / D638 % 7.5 3.0 4.3 2.5
Elongation at break,
260°C (500°F)
D1708 / D638 % 49.0 9.7 13.0 5.3
Flexural modulus,
23°C (73°F)
D790 MPa (kpsi) 5,760
(836)
6,231
(903)
6,360
(923)
7,790
(1130)
Flexural modulus,
260°C (500°F)
D790 MPa (kpsi) 3,010
(436)
3,560
(516)
3,540
(514)
5,100
(740)
Compressive stress at
10% strain, 23°C (73°F)
D695 MPa (kpsi) 230
(33.4)
222
(32.2)
220
(31.9)
172
(25)
Deformation under
13.8 MPa (2,000 psi) load
D621 % 0.05 0.03 0.05 0.03
Friction            
Coefficient of friction at
PV = .875 MPa m/s
(25,000 psi-ft/min)*
    0.26 0.22 0.25 0.12
Coefficient of friction at 
PV = 3.5 MPa m/s
(25,000 psi-ft/min)*
    0.15 0.14 0.07 0.08
Static coefficient
of friction in air*
           
PV limit (unlubricated)**   MPa-m/s
(kpsi ft/min)
  25K/0.22
100K/0.14
17.5
(500)
 
Other Properties            
Coefficient of
thermal expansion
23–300°C (73–572°F)
E831 µm/m/K
(10-6 in/in-°F)
47 (26) 44 (24) 43 (24) 29 (16)
Hardness D785 Rockwell E 95 91 91 63
Water absorption,
24 hr at 23°C (73°F)
D570 % 0.08 0.14 0.06 0.04

*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.

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