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ASTM D5481-96(2001)

Historical Reaffirmation

Standard Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary Viscometer

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1.1 This test method covers the laboratory determination of high-temperature high-shear (HTHS) viscosity of engine oils at a temperature of 150°C using a multicell capillary viscometer containing pressure, temperature, and timing instrumentation. The shear rate for this test method corresponds to an apparent shear rate at the wall of 1.4 million reciprocal seconds (1.4 10 6 s1). This shear rate has been found to decrease the discrepancy between this test method and other high-temperature high-shear test methods3 used for engine oil specifications. Viscosities are determined directly from calibrations that have been established with Newtonian oils with viscosities from 2 to 5 mPa·s at 150°C.

1.2 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.


SDO ASTM: ASTM International
Document Number D5481
Publication Date April 10, 1996
Language en - English
Page Count 5
Revision Level 96(2001)
Supercedes
Committee D02.07
Publish Date Document Id Type View
Jan. 1, 2021 D5481-21 Revision
Sept. 1, 2020 D5481-20A Revision
June 1, 2020 D5481-20 Revision
Oct. 1, 2013 D5481-13 Revision
Aug. 1, 2010 D5481-10 Revision
May 1, 2004 D5481-04 Revision
April 10, 1996 D5481-96 Revision
May 1, 2020 D5481-13R20 Reaffirmation
April 10, 1996 D5481-96R01 Reaffirmation