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  • ASTM
    D5621-07 Standard Test Method for Sonic Shear Stability of Hydraulic Fluids
    Edition: 2007
    $91.10
    Unlimited Users per year

Description of ASTM-D5621 2007

ASTM D5621 - 07

Standard Test Method for Sonic Shear Stability of Hydraulic Fluids

Active Standard ASTM D5621 | Developed by Subcommittee: D02.07

Book of Standards Volume: 05.02




ASTM D5621

Significance and Use

This test method was developed using Test Method D 2603 91.

This test method permits the evaluation of shear stability with minimum interference from thermal and oxidative factors that may be present in some applications. It has been found applicable to fluids containing both readily sheared and shear-resistant polymers. Correlation with performance in the case of hydraulic applications has been established.

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 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 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.

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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

D2603 Test Method for Sonic Shear Stability of Polymer-Containing Oils

D6022 Practice for Calculation of Permanent Shear Stability Index


Keywords

hydraulic fluid; shear stability; sonic shear test; viscosity stable; Hydraulic fluids/oils; Shear stability; Shear testing--petroleum products; Sonic shear test; Viscosity--petroleum products; Viscosity stable;


ICS Code

ICS Number Code 75.120 (Hydraulic fluids)


DOI: 10.1520/D5621-07

ASTM International is a member of CrossRef.

ASTM D5621

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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