1.1 This practice covers all hydraulic fluids based either on petroleum, synthetic, or naturally-occurring base stocks. It is not intended for water-containing hydraulic fluids.
1.2 For determination of viscosities at low temperature, this practice uses millipascal·second (mPa·s) as the unit of viscosity. For reference, 1 mPa·s is equivalent to 1 centipoise (cP). For determination of viscosities at high temperature, this practice uses millimetre squared per second (mm2 /s) as the unit of kinematic viscosity. For reference, 1 mm2 /s is equivalent to 1 centistoke (cSt).
1.3 This practice is applicable to fluids ranging in kinematic viscosity from about 4 mm2 /s to 150 mm2 /s as measured at a reference temperature of 40 °C and to temperatures from −50 °C to +16 °C for a fluid viscosity of 750 mPa·s. NOTE 1—Fluids of lesser or greater viscosity than the range described in
1.3 are seldom used as hydraulic fluids. Any mathematical extrapolation of the system to either higher or lower viscosity grades may not be appropriate. Any need to expand the system should be evaluated on its own merit.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D6080-18 Referenced Document
ASTM D2270 Standard Practice for Calculating Viscosity Index From Kinematic Viscosity at 40 and 100176C
ASTM D2422 Standard Classification of Industrial Fluid Lubricants by Viscosity System*, 2018-10-01 Update
ASTM D2983 Standard Test Method for Low-Temperature Viscosity of Lubricants Measured by Brookfield Viscometer
ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
ASTM D5621 Standard Test Method for Sonic Shear Stability of Hydraulic Fluid
ASTM E1953 Standard Practice for Description of Thermal Analysis Apparatus
ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ASTM D6080-18 history
2018ASTM D6080-18a Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
2018ASTM D6080-18 Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
2012ASTM D6080-12a Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
2012ASTM D6080-12 Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
2010ASTM D6080-10 Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
1997ASTM D6080-97(2007) Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
1997ASTM D6080-97(2002) Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids
1997ASTM D6080-97 Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids