CHEM - Apiezon Vacuum Grease Comparison Chart

Grease

AP101

AP100

M

N

Main Application

General use

Lubricating

High vacuum

General vacuum

Melting Point ASTM.D 566

>200°C

42-52°C

40-60°C

42-52°C

Working temp. range

-40 to180°C

10 to 30°C

10 to 30°C

-269 to 30°C

Vapor Pressure (@20°C)

<1.0x10^-5 Torr

7.0x10^-11 Torr

1.7x10^-9 Torr

6x10^-10 Torr

Relative Density (@20°C)

0.981

1.042

0.894

0.911

Radiation Resistance

No

No

Yes

No

Outgassing Characteristics TML ASTMS .E 595-90

-

<1.0%

-

<1.0%

Lubricity 4 Ball Test ASTM .D 2763 (IP 239)

450kg

450kg

140kg

150kg

Viscosity of molten grease (@ 50°C)

-

-

413cp

-

-

-

29.8cp

-

Coefficient of expansion per °C over 20°C-30°C

0.00066

-

0.00075

0.00072

Thermal conductivity

-

-

0.194w/m°C

0.194w/m°C

-

-

-

0.095w/m°C

Latent heat of fusion

-

-

18.7cal/g

15cal/g

Fusion Peak

-

-

34°C

31°C

Vol. resistivity

-

-

2.6x10¹⁶cm

2.0x10¹⁶cm

Permittivity

-

-

2.1

2.3

Loss tangent

-

-

<0.0001

<0.0001

Surface breakdown at flash over

-

-

28kV

27kV

Electric strength

-

-

850V

820V

Grease

H

L

T

PFPE 501

Main Application

Cryogenic

High temps

Medium temps

Melting Point ASTM.D 566

does not melt

42-52°C

112-137°C

Working temp. range

-10 to 240°C

10 to30°C

10 to 120°C

Vapor Pressure (@20°C)

1.7x10^-9 Torr

7x10^-11 Torr

4.6x10^-9 Torr

Relative Density (@20°C)

0.918

0.896

0.912

Radiation Resistance

No

Yes

No

Outgassing Characteristics TML ASTMS .E 595-90

<1.0%

<1.0%

-

Lubricity 4 Ball Test ASTM .D 2763 (IP 239)

250kg

150kg

-

Viscosity of molten grease (@ 50°C)

-

766cp

-

-

62.3cp

-

Coefficient of expansion per °C over 20°C-30°C

-

0.00076

0.00073

Thermal conductivity

-

0.216w/m°C

-

-

-

-

Latent heat of fusion

-

15.1cal/g

-

Fusion Peak

25°C

32°C

*

Vol. resistivity

-

1.2x10¹⁶cm

3.3x10¹²cm

Permittivity

-

2.3

2.3

Loss tangent

-

<0.0001

<0.0001

Surface breakdown at flash over

-

24kV

24kV

Electric strength

-

730V

730V