Commercial Aviation Fluids

MIL-PRF-6083G

RADCOLUBE® RHP6083

HYDRAULIC FLUID, OPERATIONAL, PETROLIUM BASE, PRESERVATIVE

RADCOLUBE® RHP6083 is a military-qualified, rust-inhibited petroleum hydraulic fluid consisting of synthetic hydrocarbon base oils and additives. The fluid is used both as a preservative for hydraulic systems and components as well as being an operational fluid. RADCOLUBE® RHP6083 demonstrates excellent hydraulic properties, oxidative stability and rust protection in both military and industrial/commercial applications.

Military Symbol

MIL-PRF-6083G

Qualification Numbers

H-6062

Qualification Date

9 August 2016

NATO Code

C-635

Certification Number

C2018-00035

National Stock Numbers Available From Radco

9150-00-935-9807             Quart

9150-00-935-9808             Gallon

9150-00-935-9809             5 Gallon Pail

9150-00-935-9810             55 Gallon Drum

CHARACTERISTICS REQUIREMENT RESULTS TEST METHOD
Acid Number, mgKOH/g, max 0.2 0.17 ASTM D664
API Gravity at 15.6°C/15.6°C Report 30.4 ASTM D1298
Color, ASTM Color Scale, max 5.0 Conforms ASTM D1500
Compatibility Pass Pass Paragraph 4.5.1
Copper Strip Corrosion (72 hours at 100 ± 1°C), ASTM Standard, max 2e 1b ASTM D130
Corrosion Protection (Humidity Cabinet), (100 ± 1 hours at 48.9 ± 1.1°C air temperature)     ASTM D1748
Sand-blasted (3 panels) Pass Pass  
Polished Panels (3 panels) Pass Pass  
Corrosiveness (Bimetallic Couple) Pass Pass ASTM D6547
Corrosiveness and Oxidation Stability (168 hrs at 121 ± 0.5°C)     ASTM D4636 Procedure 2
Metal specimen weight change, mg/cm2, max      
Cadmium Anode ± 0.2 0.02  
Steel Grade 1010 ± 0.2 -0.02  
Aluminum Alloy ± 0.2 0.01  
Magnesium ± 0.2 0.00  
Copper (No. 3 max) ± 0.2 0.00 (1b)  
Percent change in viscosity at 40°C -5% to +20% 12.32%  
Change in acid number, max 0.2 0.20  
Separation of insoluble materials or gumming of the fluid None None  
Evaporation Loss (22 hours at 100 ±0.5°C), % by weight, max 75% 73% ASTM D972
Foaming Characteristics      
Foaming Tendency      
Foam volume (mL) at end of 5 minute blowing period, max      
At 24°C 65 0  
At 94°C 65 10  
At 24°C after test at 94°C 65 10  
Foam Stability      
Foam volume (mL) at end of 10 minute setting period, max      
At 24°C 0 0  
At 94°C 0 0  
At 24°C after test at 94°C 0 0  
Isothermal secant bulk modulus @ 40°C and 27.6 MPa (4000 psig), MPa (psi) (minimum) 1379 MPa
(200,000 psig)
1606 MPa
(232,931 psig)
ASTM D6793
Low Temperature Stability (-54 ± 1°C for 72 hours) Pass Pass FED-STD-3458
Particulate Contamination      
Particle Count, micrometers, max      
5 - 25 10,000 5,340 ASTM D4898
26-50 250 10  
51-100 50 8  
over 100 10 4  
Gravimetric method, mg/100 mL, max 0.5 <0.005 FED-STD-3012
Pour Point (°C) max -59 <-72 ASTM D97
Rubber Swell, Standard Synthetic Rubber, NBR-L, % (168 ± 0.5 hours at 70 ± 2.5°C) 19.0% to 31.0% 19.4% ASTM D4289
Shear Stability, percent, max Pass Pass ASTM D2603
Steel-on-Steel wear (average wear scar), mm in diameter, max 1.0 0.74 ASTM D4172
Storage Stability (24 ± 3°C for 12 months) Pass Pass FED-STD-3465
Viscosity, mm2/s     ASTM D445
At -54°C, max 3,300 2859  
At -40°C, max 700 559  
At 40°C, min 13.2 15.6  
At 100°C, min 4.6 5.45  
Water, mass %, max 0.05% 0.01% ASTM D6304

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