ASTM-D5621:2013 Edition

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D5621-07(2013) Standard Test Method for Sonic Shear Stability of Hydraulic Fluids

Published By	Publication Date	Number of Pages
ASTM	2013	3

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Category: ASTM

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ASTM D5621-07-Reapproved2013

Historical Standard: Standard Test Method for Sonic Shear Stability of Hydraulic Fluids

ASTM D5621

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 oscillator.

1.2 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

1.3 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.

1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

hydraulic fluid; shear stability; sonic shear test; viscosity stable

ICS Code

ICS Number Code 75.120 (Hydraulic fluids)

DOI: 10.1520/D5621-07R13