Standard Practice for Defining the Viscosity Characteristics of Hydraulic Fluids

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-10-2018

Publisher

American Society for Testing and Materials

1.1This practice covers all hydraulic fluids based either on petroleum, synthetic, or naturally-occurring base stocks. It is not intended for water-containing hydraulic fluids.

1.2For 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).

1.3This 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.

1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5This 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.

Committee	D 02
DocumentType	Standard Practice
Pages	6
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 6080 : 2018

ASTM D 6351 : 2010 : R2016	Standard Test Method for Determination of Low Temperature Fluidity and Appearance of Hydraulic Fluids
ASTM D 6158 : 2018	Standard Specification for Mineral Hydraulic Oils

ASTM D 2983 : 2019	Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer
ASTM D 2983 : 2002	Standard Test Method for Low-Temperature Viscosity of Lubricants Measured by Brookfield Viscometer
ASTM E 29 : 2013 : R2019	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ASTM D 2422 : 1997	Standard Classification of Industrial Fluid Lubricants by Viscosity System
ASTM E 29 : 2002	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
ASTM D 2422 : 1997 : R2018	Standard Classification of Industrial Fluid Lubricants by Viscosity System
ASTM D 445 : 2021 : EDT 2	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 445 : 2017 : REV A	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 445 : 1988	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity)
ASTM D 7042 : 2021	Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)
ASTM D 2983 : 2020	Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer
ASTM D 5621 : 1994	Standard Test Method for Sonic Shear Stability of Hydraulic Fluid
ASTM D 7042 : 2004	Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)
ASTM D 445 : 2019 : REV A	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 2983 : 2021	Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer
ASTM D 445 : 2019	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 2983 : 2022	Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer
ASTM D 445 : 2001	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
ASTM D 445 : 2024	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 445 : 2021	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 2270 : 1993 : R1998	Standard Practice for Calculating Viscosity Index From Kinematic Viscosity at 40 and 100&#176C
ASTM D 2983 : 2001	Standard Test Method for Low-Temperature Viscosity of Lubricants Measured by Brookfield Viscometer
ASTM D 7042 : 2021 : REV A	Standard Test Method for Dynamic Viscosity and Density of Liquids by Stabinger Viscometer (and the Calculation of Kinematic Viscosity)
ASTM D 445 : 2018	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 2983 : 1987 : R1993	Standard Test Method for Low-Temperature Viscosity of Lubricants Measured by Brookfield Viscometer
ASTM D 2983 : 2023	Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer
ASTM D 445 : 2021 : EDT 1	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM E 1953 : 1998	Standard Practice for Description of Thermal Analysis Apparatus
ASTM D 445 : 2023	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
ASTM D 2983 : 2016	Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer
ASTM E 29 : 2022	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications