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ASTM D5621

Standard Test Method for Sonic Shear Stability of Hydraulic Fluids

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Organization: ASTM
Publication Date: 1 May 2020
Status: active
Page Count: 3
ICS Code (Hydraulic fluids): 75.120
scope:

This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator.

Evidence has been presented that a good correlation exists between the shear degradation that results from sonic oscillation and that obtained in a vane pump test procedure.2

This test method uses millimetres squared per second (mm2/s), an SI unit, as the unit of viscosity. For information, the equivalent unit, cSt, is shown in parentheses.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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.

2 Stambaugh, R. L., Kopko, R. J., and Roland, T. F., "Hydraulic Pump Performance-A Basis for Fluid Viscosity Classification," SAE Paper No. 901633. Available from Society of Automotive Engineers, 400 Commonwealth Dr., Warrendale, PA 15096.

*A Summary of Changes section appears at the end of this standard

Document History

ASTM D5621
May 1, 2020
Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator....
June 1, 2019
Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator....
December 1, 2007
Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator. ...
December 1, 2007
Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic oscillator....
August 10, 2001
Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
1. Scope 1.1 This test method covers the evaluation of the shear stability of hydraulic fluids in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a sonic...
January 1, 1994
Standard Test Method for Sonic Shear Stability of Hydraulic Fluid
1. Scope 1.1 This test method covers the evaluation of the shear stability of a hydraulic fluid in terms of the final viscosity that results from irradiating a sample of the hydraulic fluid in a...

References

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