ROYCO® 770
SYNTHETIC FIRE RESISTANT HYDRAULIC FLUID,
RUST INHIBITED
Description
ROYCO 770 is a synthetic hydraulic fluid developed to meet the severe duty demands of today's military and
industrial equipment. Rust inhibitors are utilized to provide protection to ferrous components and modern
additive technology is employed for oxidative stability, corrosion inhibition, and antiwear protection.
Applications
ROYCO 770 is intended for use in severe duty applications requiring extremes in environment and/or extended
time periods between operation such as tank and howitzer recoil mechanisms and hydraulic systems, snow
removal, earth moving and heavy duty construction equipment, and industrial robotic hydraulic systems.
ROYCO 770 is especially recommended in applications where rust protection together with a high flash point
can afford an extra margin of safety and fire protection.
Features and Benefits
Features
Synthetic hydrocarbon base fluid (PAO)
Superior Corrosion and Anti-rust inhibition
Benefits
 Superior performance to older generation naphthenic / mineral
oil based fluids;
 Compatibility with components, including seals and hoses used
in systems designed for naphthenic based fluids
 Miscible in all proportions with other PAO based as well as with
Naphthenic oil based fluids
 Excellent for protection of ferrous components in application or
storage.
Compatibility
ROYCO 770 is miscibility in all proportions with fluids meeting: MIL-PRF-5606, MIL-PRF-6083, MIL-PRF83282 and MIL-PRF-87257. It may be interchanged with these fluids in some applications. Proper fluid
selection depends on the requirements of the operating system. ROYCO 770 should not be used in aviation
hydraulic systems without prior evaluation and should not be used in systems in contact with natural rubbers.
Intermixing ROYCO 770 with petroleum based fluids will reduce its fire resistant properties.
Specifications
ROYCO 770 meets all requirements and is qualified against MIL-SPEC: MIL-PRF-46170D Type I; (Please note
that Type II of the previous revision “C” was dropped in the later revision of this specification). It is identified by
Military Symbol FRH and NATO Code H-544. ROYCO 770 is designated as an H-15 contact preservative
according to the Mil-STD-2073-1E.
Anderol Specialty Lubricants
a division of Chemtura Corporation
215 Merry Lane
East Hanover, NJ 07936 USA
1 of 2
Technical Service +1.973.887.7410
Customer Service +1.203.573.4595
Fax 203.573.2324
info-anderol@chemtura.com
www.anderol.com
Typical Properties
PROPERTY
Kinematic Viscosity, cSt
@ 100°C
@ 40°C
@ -40°C
Low Temperature Stability, -40°C, 72 hours
Flash Point, °C (°F)
Fire Point, °C (°F)
Autoignition Temperature, °C (°F)
Pour Point, °C (°F)
Acid Number, mq KOH/g
Galvanic Corrosion, 10 day
Density pounds per gallon, (15.6°C)
Gravimetric Filtration, mg
Filtration Time, minutes
Water Content, wt %
Water Sensitivity, %
Foam Characteristics, Initial (mL) / Final (mL)
Sequence I
Sequence II
Sequence III
Evaporation, 205°C, 6.5 hours, % loss
Lubricity, 4-Ball Wear, scar diameter, mm
15 Kg, 1200 RPM, 1 hour, 75oC
40 Kg, 1200 RPM, 1 hour, 75oC
Humidity Cabinet, 100 hours
Rubber Swell “L”, 70°C, 168 hours, %
Solid Particle Contamination, auto counter
Filtration time, min
5-15 mu
16-25 mu
26-50 mu
51-100 mu
100+ mu
TEST METHOD
ASTM D445
FTM 3458
ASTM D92
ASTM D92
ASTM E659
ASTM D97
ASTM D664
ASTM D6547
ASTM D1298
ASTM D4898
ASTM D6304
MIL-PRF-46170
ASTM D892
FTM 350
ASTM D4172
ASTM D1748
FTM 3603
FTM 3009
ROYCO® 770
3.71
15.5
2409
Pass
223 (433)
249 (480)
375 (707)
-69 (-91)
0.12
pass
7.216
0.4
7.5
0.02
99.8
18/0
9/0
14/0
10.5
0.25
0.41
pass
18.8
1426
95
30
6
0.3
Packaging
ROYCO 770 is available in 5-gallon pails, and 55-gallon drums. Other containers may be available on request.
The information contained herein relates to a specific Chemtura product and its use, and is based on
information available as of the date hereof. Additional information relating to the product can be obtained
from the pertinent Material Safety Data Sheets. Nothing in this Technical Data Sheet constitutes a term or
condition of sale nor shall it take precedence over, supersede or modify or be construed to take precedence
over, supersede or modify, any of Chemtura's standard or other terms and conditions of sale under which
the product is sold by Chemtura. NOTHING IN THIS TECHNICAL DATA SHEET CONSTITUTES, NOR
SHALL IT BE CONSTRUED TO CONSTITUTE, A REPRESENTATION OR WARRANTY, EXPRESS OR
IMPLIED, REGARDING THE PRODUCT'S CHARACTERISTICS, USE, QUALITY, SAFETY,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Nothing contained herein shall
constitute permission or recommendation to practice any intellectual property without the permission of the
owner. This product is sold only under terms and conditions agreed in writing by Chemtura and the
respective buyer and the terms and conditions of such agreements shall in all cases prevail. ANDEROL,
ROYCO, AOSyn and PQ and their corresponding logos are trademarks of Chemtura Corporation or one of
its subsidiaries. Copyright (c) 2010 Chemtura Corporation. All rights reserved.
2 of 2
Anderol Specialty Lubricants
a division of Chemtura Corporation
215 Merry Lane
East Hanover, New Jersey 07936
Technical Service +1.973.887.7410
Customer Service +1.203.573.4595
Fax +1.203.573.2324
info-anderol@chemtura.com
www.anderol.com