Apiezon N cryogenic high vacuum grease (previously M015) (EMS)

Apiezon N is a speciality grease for various cryogenic uses, including for vacuum sealing at very low to warm temperatures where its vapour pressure is very low, making it suitable for high vacuum applications. Type N does not craze or crack at low temperatures, has good thermal conductivity at low temperatures and is ideal for mounting sensors and other devices. It has very low levels of magnetic susceptibility which makes it suitable for some superconductor applications. Cycling between absolute zero and +40°C is well tolerated by Apiezon ; N. It is frequently used as a jointing medium on cryostat flanges where its larger contact area, compared with that of indium wire, provides much better thermal transfer. Applications include cryo-systems on electron microscopes, cryostats, magnetic image resonance systems, sealing of vacuum parts including glass joints and as a heat sink.There are many types of grease currently available, such as PFPE based products that quot...

Apiezon N is a speciality grease for various cryogenic uses, including for vacuum sealing at very low to warm temperatures where its vapour pressure is very low, making it suitable for high vacuum applications. Type N does not craze or crack at low temperatures, has good thermal conductivity at low temperatures and is ideal for mounting sensors and other devices. It has very low levels of magnetic susceptibility which makes it suitable for some superconductor applications. Cycling between absolute zero and +40°C is well tolerated by Apiezon ; N. It is frequently used as a jointing medium on cryostat flanges where its larger contact area, compared with that of indium wire, provides much better thermal transfer. Applications include cryo-systems on electron microscopes, cryostats, magnetic image resonance systems, sealing of vacuum parts including glass joints and as a heat sink.

There are many types of grease currently available, such as PFPE based products that quote operating temperatures well below 0°C. However, nearly all these products have a quoted operating temperature range limit of -80°C. Typical heat sink compounds are only quoted as working down to -50°C. The one exception is hydrocarbon based grease (with proprietary additives) which can operate all the way down to -269°C, the temperature at which liquid helium boils.

SpecializedHydrocarbon-based Grease for Cryogenic Applications 


Typical Property AP101 AP100 H L M N T
Main area of
application
General Lubricating Cryogenic High Temp High Vacuum General Vacuum Medium Temp
Melting Point:
ASTM.D 566
°C
°F
>200
>392
42-52
108-126
does not melt 42-52
108-126
40-60
104-140
42-52
108-126
112-137
233-278
Working temp. range °C
°F
-40-180
-40-365
10-30
50-86
-10-240
14-464
10-30
50-86
10-30
50-86
-269-30
-452-86
10-120
50-248
Vapor Pressure
Torr @20°C
<1.0x10-5 7.0x10-11 1.7x10-9 7x10-11 1.7x10-9 6x10-10 4.6x10-9
Relative Density 20°C 0.981 1.042 0.918 0.896 0.894 0.911 0.912
Radiation Resistance No No No Yes Yes No No
Outgassing
Characteristics
ASTMS .E
595-90
TML
CVCM
-
-
<1.0%
<0.1%
<1.0%
<0.1%
<1.0%
<0.1%
-
-
<1.0%
<0.1%
-
-
Lubricity 4 Ball Test
ASTM .D 2763
(IP 239), Kg
450 450 250 150 140 150 -
Viscosity of molten
grease, cP
50°C
100°C
-
-
-
-
-
-
766
62.3
413
29.8
-
-
-
-
Coefficient of
expansion per °C
over 20°C-30°C
0.00066 - - 0.00076 0.00075 0.00072 0.00073
Thermal conductivity,
w/m°C
-
-
-
-
-
-
0.216
-
0.194
-
0.194
0.095
-
-
Latent heat of fusion,
cal/g
- - - 15.1 18.7 15.0 -
Fusion Peak °C - - 25 32 34 31 *
Vol. resistivity, cm - - - 1.2x1016 2.6x1016 2.0x1016 3.3x1012
Permittivity - - - 2.3 2.1 2.3 2.3
Loss tangent - - - <0.0001 <0.0001 <0.0001 <0.0001
Surface breakdown
at flash over, kV
- - - 24 28 27 24
Electric strength, V - - - 730 850 820 730
Code Title Pack Size Availability Price Updated: 30-05-2024
M1-N-00025-X Apiezon N cryogenic high vacuum grease (previously M015) (EMS) 25g See above $494.00 AUD