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ExxonMobil Mobil Aero HFA
Categories: Fluid; Lubricant

Material Notes: Mobil Aero HFA, HF, and HFS are formulated for aircraft systems where use of hydrocarbon-based hydraulic fluids is required. They are low viscosity products, high VI (viscosity index) fluid with excellent low temperature properties, good anti-wear performance, and good chemical stability. Mobil Aero HFA and HF are composed of mineral base oil stock and contain shear-stable VI improvers; Mobil Aero HFS is a synthetic polyalphaolefin-based fluid.

Mobil Aero HFA is a premium quality fluid that meets the requirements of the U.S. Military specification MIL-H-5606A (now obsolete). It has a very high VI and is suitable for use at temperatures down to -54 ºC (-65 ºF). While this quality fluid is no longer used by the U.S. Military, it is still used in some older, small private, and commercial aircraft. It is also used in industrial and commercial equipment requiring good fluidity at very low temperatures, where Mobil Aero HFA provides long, trouble-free service over a wide range of operating conditions. Mobil Aero HF is a premium quality fluid that is approved against the most current version of U.S. Military specification MIL-PRF-5606. It has physical properties very similar to Mobil Aero HFA, and also meets "super-clean" requirements required by modern aircraft hydraulic systems. It is intended primarily for military aircraft, but it is also used as a hydraulic fluid for small private and commercial aircraft, and as a strut fluid in landing gear of large commercial aircraft. It is a NATO Code Number H-515 fluid. Mobil Aero HFS is a synthetic polyalphaolefin lubricant that is approved against the most current version of U.S. Military specification MIL-PRF-83282. It does not contain a viscosity index (VI) improver. It is designed for use at temperatures down to -40ºC (-40ºF). It provides lower flammability and volatility and improved stability, but has a higher viscosity at low temperature then Mobil Aero HF. It meets the "super-clean" requirements. It is intended primarily for U.S. military aircraft.It is a NATO Code Number H-537 fluid.

Vendors:
Available Properties
  • Specific Gravity, ASTM D4052
  • API Gravity
  • Viscosity Measurement, ASTM D2270, Index
  • Viscosity Measure, ASTM D445
  • Viscosity Measure, ASTM D445, Kinematic Viscosity
  • Viscosity Measure, ASTM D445, Kinematic Viscosity
  • Kinematic Viscosity at 40°C (104°F), ASTM D445
  • Kinematic Viscosity at 100°C (212°F), ASTM D445
  • Evaporation Loss, 6.5 hr @ 205°C
  • Total Acid Number
  • Bulk Modulus, Isothermal secant at 40°C, 4000 psig
  • Four Ball Wear, ASTM D4172, 40 kg, 75°C, 1200 rpm
  • Pour Point, ASTM D97
  • Flash Point, ASTM D92
  • H2O
  
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