MIL-PRF-87257B
TABLE I. Properties and test methods.
Test Method
ASTM
FED-
Property
Test Limits
STD-
791
Acid number, mg KOH/g
0.20 max
D 664
Aerobic aquatic biodegradation
Class I min
D 5864
API gravity @ 15.6°C/15.6°C
D 287
Barium content, parts per million
10 max
D 5185
Color (3)
D 1500
Compatibility (5)
D 4636
Corrosiveness and oxidation stability
(168 hours @ 135 ±1°C)
0.20 max
Change in acid number, mg KOH/g
Percent change in viscosity @ 40°C
±10 max
Metal specimen weight change, mg/cm² (7)
±0.2 max
M-50 steel
±0.2 max
Aluminum
±0.2 max
Magnesium
Cadmium plated steel (8)
±0.2 max
Copper (9)
±0.6 max
None
Separation of insoluble materials or gumming
of the fluid
Evaporation loss (6.5 hours @ 135°C), weight percent
20 max
D 972
Flammability
High temperature-high pressure spray ignition
6052
Flame propagation cm/sec
0.5 max
D 5306
Flash point, °C
160 min
D 92
Fire point, °C
170 min
D 92
D 892
Foaming characteristics @ 24°C
Foaming tendency, ml
65 max
(volume at end of five-minute blowing period)
Foam stability, ml
Complete
(volume at end of ten-minute settling period)
collapse (11)
D 4172
Four-ball, use test condition A, scar diameter, mm
0.21 max
1 kg load
0.30 max
10 kg load
0.65 max
40 kg load
6
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