MIL-PRF-17331K(SH)
TABLE I. Chemical and physical requirements and test methods.
Test Method
Characteristics
Requirement
(ASTM or other)
1/
Sulfur, %
D129, D1552, D2622,
D4927, D4951, D6443,
D6481
Acid number, mg KOH/g oil, max.
0.3
D974
2/
Corrosion (in presence of salt water)
None
D665, Procedure B
Corrosion test at 100 °C (212 °F), (Copper strip) appearance,
Classification 1
D130
max.
Oil compatibility
Pass
See 4.4.5
Water, percent, max.
0.01
D6304
1/
Gravity, API
D287, D1298, D4052
Air release time, (minutes at 50 °C, max.)
20
D3427
Flash point, °C (°F), min.
204 (400)
D92
Pour point, °C (°F), max.
-6 (20)
D97, D5950
Viscosity:
D445
mm2/s at 4.4 °C (40 °F), max.
870
mm2/s at 40 °C (104 °F)
77-97
mm2/s at 100 °C (212 °F), min.
8.0
3/
Emulsion test, after 30 minutes settling time
41/-/3
D1401
Oil layer/water layer/emulsion, max.
Oxidation test, after 1000 hours:
D943
Acid number, mg KOH/g, max.
2.0
D974
Total sludge, mg, max.
100
D4310
4/
Total iron, mg, max.
100
D4310
Total copper, mg, max.
100
D4310
1/
Oxidation by rotating pressure vessel, minutes to failure, min.
D2272
200
Scuffing load capacity (FZG), failure load stage
Load Stage 9
D5182
5/
Wear test, scar diameter, mm, max.
0.33
D4172
Homogeneity, separation
None
See 4.4.1
6/
Foam characteristics:
D892
After blowing/after 10 minutes
Sequence I, mL, max.
65/0
Sequence II, mL, max.
65/0
Sequence III, mL, max.
65/0
7/
Cleanliness, mg/100 mL, max.
2.5
D4898
5
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