ExxonMobil Exxon Hyjet IV-A

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ExxonMobil Exxon Hyjet IV-A
Categories:	Fluid; Lubricant
Material Notes:	Exxon HyJet IV-Aplus is a fire-resistant phosphate ester hydraulic fluid designed for use in commercial aircraft. It is the best-performing Type IV fluid and offers to a great extent many of the performance capabilities of Type V fluids, including high temperature stability, low density, and rust protection. It is superior to all other Type IV fluids in these respects. Exxon HyJet IV-Aplus meets the specifications of all major aircraft manufacturers and SAE AS1241. Exxon HyJet IV-Aplus fire-resistant aviation hydraulic fluid is used in commercial aircraft hydraulic systems where phosphate hydraulic fluids are recommended. Exxon HyJet IV-Aplus meets or exceeds the following industry and builder specifications. It is approved against the aircraft manufacturer requirements and is included in their Qualified Products Lists.
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Physical Properties	Original Value	Comments

Specific Gravity	0.996 g/cc @Temperature 25.0 °C	ASTM D4052
Density	1.001 g/cc @Temperature 15.6 °C	ASTM D4052
Viscosity Measurement	320	Index; ASTM D2270
Viscosity Measure	1320 cSt @Temperature -54.0 °C	Kinematic Viscosity; ASTM D445
Kinematic Viscosity at 40°C (104°F)	10.55 cSt	ASTM D445
Kinematic Viscosity at 100°C (212°F)	3.57 cSt	ASTM D445
Evaporation Loss	15 %	6 hr @ 71°C

Chemical Properties	Original Value	Comments
Total Acid Number	0.040	mgKOH/g; ASTM D974

Mechanical Properties	Original Value	Comments
Bulk Modulus	1.448 GPa	Isothermal secant at 100°F/3000psi

Electrical Properties	Original Value	Comments
Electrical Resistivity	71.4 ohm-cm @Temperature 20.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	860 µm/m-°C @Temperature 25.0 - 100 °C
Specific Heat Capacity	0.410 BTU/lb-°F
Thermal Conductivity	0.000330 cal cm/sec-cm²-°C @Temperature 40.0 °C
Pour Point	<= -62.0 °C	ASTM D97
Flammability Test	185	Fire Point [°C]
	>= 427	Auto Ignition [°C]
Flash Point	174 °C	ASTM D92

Component Elements Properties	Original Value	Comments
Calcium, Ca	0.011 %
Chlorine, Cl	<= 0.00070 %
H2O, Water	0.10 %
Potassium, K	0.0037 %
Sodium, Na	0.00 %
Sulfur, S	0.022 %

Descriptive Properties
Foam Sequence I, ASTM D1137	0/0
Foam Sequence II, ASTM D893	0/0
Foam Sequence III, ASTM D893	0/0
Particle Count, NAS 1638 Class	4
Sonic Shear Stability, KV change %	22	@ 40°C

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WEXXON349 / 75774

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