VESPEL

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VESPEL

Vespel has the best heat resistance and abrasion resistance among high-performance resins. Since it was merchandised in 1962, it has been widely used as components in aircraft, aerospace and munitions industries as well as modern-day applications including automotive, OA equipment, electronics, scientific instruments, industrial machinery, production facilities, etc.

Features

Ultra heat resistance: continuous operating temperature 288℃, short time 480℃, extremely low temperatures (1k or less).
Abrasion resistance: PV limit without lubrication is more than 10 times that of most engineering plastics.
Creep at 260℃ and 186kg/㎠ is no more than 0.6% per 1,000 hours.
Electrical insulation: dielectric strength 22KV/mm
Plasma and Radiation Strengths
Chemical Resistance: resistant to grease, oil solvent
Resistance to gas release in 10-10 vacuum: high vacuum torr
Excellent machinability

– Physical property –

Property

Temp.℃

ASTM
method

Units

SP1

SP21

SP22

SP211

SP3

M

DF

M

DF

M

DF

M

DF

M

Tensile strength

23

D-1708
Or E8t

MPa

86.2

72.4

65.5

62.0

51.7

48.3

44.8

51.7

58.5

260

41.4

36.5

37.9

30.3

23.4

26.2

24.1

24.1

break elongation

23

D-1702
Or E8t

%

7.5

7.5

4.5

5.5

3.0

2.5

3.5

5.5

40

260

6.0

7.0

3.0

5.2

2.0

2.0

3.0

5.3

Flexural strength

23

E-790

MPa

10.3

82.7

110.3

82.7

89.6

62.1

68.9

68.9

75.8

260

62.1

44.8

62.0

48.3

44.8

37.9

34.5

34.5

39.9

flexural modulus of elasticity

23

E-790

MPa

3102

2482

3792

3171

4826

4826

3102

2758

3275

260

1724

1448

2551

1792

2758

2758

1379

1379

1862

Compressive strength
At 1% strain
At 10% strain
At 0.1% strain

23

E-695

MPa

24.8
133.1
51.0

24.1*
112.4*
33.1*

29.0
133.1
45.5

22.8*
104.8*
33.8*

31.7
112.4
41.4

24.1*
93.8*
25.5*

20.7
102.0
37.2

14.5*
75.8*
27.6*

34.5
127.6

compressive modulus of elasticity

23

D-695

MPa

2413

2413*

2895

2275*

3275

2654*

2068

1379*

2413

axial direction fatigue limit
At 103cycles
At 107 cycles

23
260
23
260

MPa

55.8
26.2
42.1
16.5

46.2
22.8
32.4
16.5

flexural fatigue limit
At 103cycles
At 107 cycles

23
23

MPa

65.5
44.8

65.5
44.8

shear strength

23

D-732

MPa

89.6

77.2

Izod notched
impact strength

23

D-256

J/m

42.7

42.7

21.3

Izo, unnotched
impact strength

23

D-256

J/m

747

320

112

23

0.41

0.41

abrasion rate[Wear rate]

m/s x 1010

17-85

17-85

6.30

6.30

4.20

4.20

4.90

4.90

17-23

friction coefficient
PV=0,875 MPa•m/s
PV=3,5 MPa•m/s

0.29

0.29

0.24
0.12

0.24
0.12

0.30
0.09

0.30
0.09

0.12
0.08

0.12

0.25
0.17

In vacuum

0.08

0.03

Static in air

0.35

0.30

0.27

0.20

Coefficient of Linear Thermal Expansion

23to260
-62to+23

D-696

W/m/℃

54
45

50

49
34

41

38

27

54

41

52

thermal conductivity

40

W/m.℃

0.35

0.29*

0.87

0.46*

1.73

0.89*

0.76

0.42*

0.47

specific heat

J/kg/℃

1130

load strain

50

D-621

%

0.14

0.20

0.10

0.17

0.08

0.14

0.13

0.29

0.12

Heat Deflection Temperature

D-648

~360

~360

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