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ASTM D5621-94

Historical Revision

Standard Test Method for Sonic Shear Stability of Hydraulic Fluids

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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 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.

1.3 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.

1.4 This test method uses millimetres squared per second (mm ²/s), an SI unit, as the unit of viscosity. For information, the equivalent unit, cSt, is shown in parentheses.


SDO ASTM: ASTM International
Document Number D5621
Publication Date Aug. 10, 2001
Language en - English
Page Count 3
Revision Level 94
Supercedes
Committee D02.07
Publish Date Document Id Type View
May 1, 2024 D5621-24 Revision
May 1, 2020 D5621-20 Revision
June 1, 2019 D5621-19 Revision
Dec. 1, 2007 D5621-07 Revision
Aug. 10, 2001 D5621-94 Revision
Aug. 10, 2001 D5621-01 Revision
Oct. 1, 2013 D5621-07R13 Reaffirmation