Krytox™ 240AB Grease

Viscosity (cSt):

@ 20°C (68°F): 240
@ 38°C (100°F): 86
@ 99°C (210°F): 10.5
@ 204°C (400°F): 2.1

Vapor pressure of base oil:
@ 38°C (100°F): 5 x 10 e −6
@ 260°C (500°F): 3 x 10 e −2

Volatility of base oil (wt% loss in 22 hrs):
@ 149°C (300°F): 1.9
@ 204°C (400°F): 17.3
@ 260°C (500°F): 76.2

Oil separation (wt% loss in 30 hrs):
@ 99°C (210°F): 4
@ 204°C (400°F): 12

Pour point of base oil: −40°C (−40°F)
Texture: Buttery
NLGI Grade: 2
Mechanical stability (ASTM D217, 10,000 and 100,000 strokes): No change
Oxidation stability @ 99°C (210°F): 0 psig pressure drop after 600 hrs
Liquid oxygen impact (ASTM D2512, NASA MSFC 106B): Pass
Grease density @ 25°C (77°F): 1.92 g/mL
Estimated useful range: −40°C to 232°C (−40°F to 450°F)
Qualification reference number: AFPET/PTP 08-012
MIL-SPEC: MIL-PRF-27617 Tyler 2
NATO number: G-398
Change in worked penetration: +3
Corrosion on copper (2b max): 1b
High-temperature bearing performance (500 hrs min at 10,000 rpm, 204°C): Stopped at 1,320 hrs
Evaporation (ASTM D-2595, %): 10.1
Solubility in Fuel (%): 0.3
Water washout characteristics (%): 0.25
Dirt Count: 75 micron and larger: 0 25–75 micron: 0
Distilled water: Pass 50/50
Distilled water/ethanol: Pass
Film stability and corrosion on steel: Pass
Primary Chemistry: PFPE (Perfluoropolyether)