MIL-PRF-53074A
2.4 Order of precedence. In the event of a conflict between the text of this document
and the references cited herein, the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations unless a specific exemption has
been obtained.
3. REQUIREMENTS
3.1 Materials. Unless otherwise specified herein, the materials selection is the prerogative
of the contractor as long as all articles submitted to the Government fully meet the requirements
specified.
3.1.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered,
or environmentally preferable materials should be used to the maximum extent possible provided
that the material meets or exceeds the operational and maintenance requirements, and promotes
economically advantageous life cycle costs.
3.2 Operating requirements. Steam cylinder mineral lubricating oils shall conform to the
requirements as specified in 3.2.1.
3.2.1 Finished oil properties. The values shall not exceed the maximum (max.) or fall
below the minimum (min.) limits as specified in table I.
TABLE I. Finished oil properties.
MIL Grade/Symbol
Property
5190
5230
Kinematic Viscosity, Centistoke (cSt)
38.9 - 47.7 47.9 - 52.1
@ 100 degrees Celsius (°C)
Viscosity Index, min.
---
90
Pour Point. °C, max.
16
16
Flash Point, °C, min.
274
304
Neutrality, qualitative
Neutral
Neutral
Acid or base number, max.
0.15
0.10
Copper Corrosion @ 100 °C, max. 1/
1
1
Water, %
None
None
Ash, % wt, max.
0.05
0.05
Ramsbottom Carbon Residue, %, max.
2.51
2.51
Total sulfur, %, max.
0.50
0.50
Precipitation number, max.
0.05
0.05
Saponification number, max.
0.5
0.5
1/ No moisture visible in distillation trap.
4
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