Krytox 240AC Grease

Krytox 240AC is a white buttery grease that is nonreactive, nonflammable, safe in chemical and oxygen service, and is extremely long-lasting. Meets MIL-PRF-27617 Type I, II and III. Krytox 240AC also provides NSF approval for incidental food contact under (H-1).

Krytox 240AC grease is based on perfluoropolyether (PFPE) oils. These synthetic fluorinated lubricants are used in extreme conditions such as continuous high temperatures up to 300 °C (572 °F) and higher temperatures for shorter periods, depending on product grade limits. Chemically inert and safe for use around hazardous chemicals, these lubricants are nonflammable and are safe for use in oxygen service. Krytox oils and greases are silicone free and do not damage plastics or elastomers or cause corrosion to metals. They are commonly used as lubricants in aerospace, automotive, industrial and semiconductor applications as well as solving many other routine lubrication problems. Krytox greases are the original products that this military specification was written for and have been certified continuously since the specification was originally written. This is the latest data the re-certification that is required every five years. Krytox greases are standard as NLGI Grade 2 penetration. If the 240 AZ is ordered to meet MIL-SPEC requirements, it must be ordered as NLGI Grade 1 to meet the specification.

Applications for Krytox 240AC lubricants are generally of a critical nature with temperatures in all industries reaching extremes for conventional lubricants. They are expected to be durable in the most aggressive environments and are now often considered an integral part of the design. Where failure of components is not an option, whether because of durability, warranty, safety, loss of productivity or down time, Krytox is the lubricant of choice in a wide range of industries and applications.

In the aerospace industry, Krytox 240 AC grease is applied on various settings spanning bearings and sealants to o-rings and oxygen systems. Krytox is a valuable asset to the aerospace industry due to its superior performance in a wide range of temperatures scaling 70 to 399ºC (–100 to 750 ºF). In addition, it is robust in harsh environments and has excellent frictional properties, allowing it to resist change in properties over time, provide longer wear, and lower energy consumption. Krytox lubricants are compatible with all metals, elastomers, plastics, paints, and finishes. Due to the intense and severe circumstance of the aerospace industry, it can be expected that Krytox delivers a high level of product excellence.

Technical data Krytox 240AC

Viscosity (cSt):
@ 20 ° C (68 ° F): 800
@ 38 ° C (100 ° F): 270
@ 99 ° C (210 ° F): 26
@ 204 ° C (400 ° F): 4.1
Vapor Pressure of Base Oil:
@ 38 ° C (100 ° F): 8 x 10 e -8
@ 260 ° C (500 ° F): 2 x 10 e -3
Volatility of Base Oil (wt% loss in 22 hr.):
@ 149 ° C (300 ° F): 0
@ 204 ° C (400 ° F): <1
@ 260 ° C (500 ° F): 4
Pour Point of Base Oil: -35 ° C (-30 ° 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 hr
Liquid Oxygen Impact (ASTM D2512, NASA MSFC 106B): Pass
Grease Density (at 25 ° C / 77 ° F): 1.93 g / mL
Oil Separation (wt% loss in 30 hours):
@ 99 ° C (210 ° F): 3
@ 204 ° C (400 ° F): 11
Estimated Useful Range: -34 ° C to 288 ° C (-30 ° F to 550 ° 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 hr min at 10,000 rpm, 204 ° C): Stopped at 1,320 hr
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 microns: 0
Resistance to Aqueous Solution:
Distilled Water: Pass
50/50 Distilled Water / Ethanol: Pass
Film Stability and Corrosion on Steel: Pass

Primary Chemistry: PFPE

Features & Benefits Krytox 240 AC

• Chemically Inert
• Broad temperature performance
• Low out-gassing
• Non-flammable
• Meets the following specifications:
• MIL-PRF-27617 Type III
• Nato # G-399
• NSF H-1 Food Grade

Applications Krytox 240 AC

• Bearings
• Seals
• Valves
• Oxygen Devices
• O-Rings
• Threads

Where to buy Krytox 240AC?

Hicotech Vietnam Co., Ltd is the distribution representative of Chemours in Vietnam.

Krytox 240AC distributed by Hicotech origin: USA 100%

Krytox 240AC have different packages such as: 0.5 oz, 1oz, 2oz; tube 2oz, 4oz, 8oz; box 0.5kg, 1kg; 5kg, 7kg, 20kg pail.