ASTM D4741-21
(Test Method)Standard Test Method for Measuring Viscosity at High Temperature and High Shear Rate by Tapered-Plug Viscometer
Standard Test Method for Measuring Viscosity at High Temperature and High Shear Rate by Tapered-Plug Viscometer
SIGNIFICANCE AND USE
5.1 Viscosity measured under the conditions of this test method is considered to be representative of that at the temperatures and shear rates but not the pressures in the journal bearings of internal combustion engines under operating conditions.
5.2 The relevance of these conditions to the measurement of engine-oil viscosity has been discussed in many publications.6
5.3 The high temperature high shear (HTHS) viscosity at this shear rate can be measured at other temperatures using this apparatus. This is achieved by the use of a different range of Newtonian calibration fluids. The precision has not been studied for any temperature or viscosity range not noted in the precision section.
SCOPE
1.1 This test method2 covers the laboratory determination of the viscosity of oils at 150 °C and 1 × 106 s–1 and at 100 °C and 1 × 106 s–1, using high shear rate tapered-plug viscometer models BE/C or BS/C.
1.2 Newtonian calibration oils are used to adjust the working gap and for calibration of the apparatus. These calibration oils cover a range from approximately 1.4 mPa·s to 5.9 mPa·s (cP) at 150 °C and 4.2 mPa·s to 18.9 mPa·s (cP) at 100 °C. This test method should not be used for extrapolation to higher viscosities than those of the Newtonian calibration oils used for calibration of the apparatus. If it is so used, the precision statement will no longer apply. The precision has only been determined for the viscosity range 1.48 mPa·s to 5.07 mPa·s at 150 °C and from 4.9 mPa·s to 11.8 mPa·s at 100 °C for the materials listed in the precision section.
1.3 A non-Newtonian reference oil is used to check that the working conditions are correct. The exact viscosity appropriate to each batch of this oil is established by testing on a number of instruments in different laboratories. The agreed value for this reference oil may be obtained from the chairman of the Coordinating European Council (CEC) Surveillance Group for CEC L-36-90, or from the distributor.
1.4 Applicability to products other than engine oils has not been determined in preparing this test method.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard except those noted below.
1.5.1 Exception—This test method uses the SI unit millipascal-second (mPa·s) as the unit of viscosity. (1 cP = 1 mPa·s.)
1.6 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.
1.7 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.
General Information
Relations
Buy Standard
Standards Content (Sample)
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.
Designation: D4741 − 21
Standard Test Method for
Measuring Viscosity at High Temperature and High Shear
1
Rate by Tapered-Plug Viscometer
This standard is issued under the fixed designation D4741; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 1.6 This standard does not purport to address all of the
2 safety concerns, if any, associated with its use. It is the
1.1 Thistestmethod coversthelaboratorydeterminationof
6 –1 responsibility of the user of this standard to establish appro-
theviscosityofoilsat150°Cand1×10 s andat100°Cand
6 –1 priate safety, health, and environmental practices and deter-
1×10 s , using high shear rate tapered-plug viscometer
mine the applicability of regulatory limitations prior to use.
models BE/C or BS/C.
1.7 This international standard was developed in accor-
1.2 Newtonian calibration oils are used to adjust the work-
dance with internationally recognized principles on standard-
ing gap and for calibration of the apparatus. These calibration
ization established in the Decision on Principles for the
oils cover a range from approximately 1.4mPa·s to 5.9 mPa·s
Development of International Standards, Guides and Recom-
(cP)at150°Cand4.2mPa·sto18.9mPa·s(cP)at100°C.This
mendations issued by the World Trade Organization Technical
test method should not be used for extrapolation to higher
Barriers to Trade (TBT) Committee.
viscositiesthanthoseoftheNewtoniancalibrationoilsusedfor
calibration of the apparatus. If it is so used, the precision 2. Referenced Documents
3
statement will no longer apply. The precision has only been
2.1 ASTM Standards:
determined for the viscosity range 1.48mPa·s to 5.07 mPa·s at
D4683Test Method for Measuring Viscosity of New and
150 °C and from 4.9mPa·s to 11.8 mPa·s at 100°C for the
Used Engine Oils at High Shear Rate and High Tempera-
materials listed in the precision section.
ture by Tapered Bearing Simulator Viscometer at 150°C
1.3 Anon-Newtonian reference oil is used to check that the D5481Test Method for Measuring Apparent Viscosity at
workingconditionsarecorrect.Theexactviscosityappropriate High-TemperatureandHigh-ShearRatebyMulticellCap-
to each batch of this oil is established by testing on a number illary Viscometer
of instruments in different laboratories. The agreed value for D6300Practice for Determination of Precision and Bias
this reference oil may be obtained from the chairman of the Data for Use in Test Methods for Petroleum Products,
Coordinating European Council (CEC) Surveillance Group for Liquid Fuels, and Lubricants
CEC L-36-90, or from the distributor. D6708Practice for StatisticalAssessment and Improvement
of Expected Agreement Between Two Test Methods that
1.4 Applicability to products other than engine oils has not
Purport to Measure the Same Property of a Material
been determined in preparing this test method.
4
2.2 Coordinating European Council (CEC) Standard:
1.5 The values stated in SI units are to be regarded as
CEC L-36-90The Measurement of Lubricant Dynamic Vis-
standard. No other units of measurement are included in this
cosity under Conditions of High Shear (Ravenfield)
standard except those noted below.
1.5.1 Exception—This test method uses the SI unit
millipascal-second (mPa·s) as the unit of viscosity. (1cP =
1mPa·s.)
1
This test method is under the jurisdiction of ASTM Committee D02 on
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
3
Subcommittee D02.07 on Flow Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2021. Published January 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1987. Last previous edition approved in 2020 as D4741–20a. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D4741-21. the ASTM website.
2 4
This test method is technically identical to that described in CEC L-36-90 Available from Coordinating European Council (CEC), Services provided by
(under the jurisdiction of the CEC Engine Lubricants Technical Committee) and in Kellen Europe, Avenue Jules Bordet 142 - 1140, Brussels, Belgium, http://
IP370. www.cectests.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4741 − 20a D4741 − 21
Standard Test Method for
Measuring Viscosity at High Temperature and High Shear
1
Rate by Tapered-Plug Viscometer
This standard is issued under the fixed designation D4741; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
2 6 –1
1.1 This test method covers the laboratory determination of the viscosity of oils at 150 °C and 1 × 10 s and at 100 °C and 1
6 –1
× 10 s , using high shear rate tapered-plug viscometer models BE/C or BS/C.
1.2 Newtonian calibration oils are used to adjust the working gap and for calibration of the apparatus. These calibration oils cover
a range from approximately 1.4 mPa·s to 5.9 mPa·s (cP) at 150 °C and 4.2 mPa·s to 18.9 mPa·s (cP) at 100 °C. This test method
should not be used for extrapolation to higher viscosities than those of the Newtonian calibration oils used for calibration of the
apparatus. If it is so used, the precision statement will no longer apply. The precision has only been determined for the viscosity
range 1.48 mPa·s to 5.07 mPa·s at 150 °C and from 4.9 mPa·s to 11.8 mPa·s at 100 °C for the materials listed in the precision
section.
1.3 A non-Newtonian reference oil is used to check that the working conditions are correct. The exact viscosity appropriate to each
batch of this oil is established by testing on a number of instruments in different laboratories. The agreed value for this reference
oil may be obtained from the chairman of the Coordinating European Council (CEC) Surveillance Group for CEC L-36-90, or from
the distributor.
1.4 Applicability to products other than engine oils has not been determined in preparing this test method.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard except
those noted below.
1.5.1 Exception—This test method uses the SI unit millipascal-second (mPa·s) as the unit of viscosity. (1 cP = 1 mPa·s.)1 mPa·s.)
1.6 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.
1.7 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.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.07 on Flow Properties.
Current edition approved Sept. 1, 2020Jan. 1, 2021. Published October 2020January 2021. Originally approved in 1987. Last previous edition approved in 2020 as
D4741 – 20.D4741 – 20a. DOI: 10.1520/D4741-20A.10.1520/D4741-21.
2
This test method is technically identical to that described in CEC L-36-90 (under the jurisdiction of the CEC Engine Lubricants Technical Committee) and in IP 370.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4741 − 21
2. Referenced Documents
3
2.1 ASTM Standards:
D4683 Test Method for Measuring Viscosity of New and Used Engine Oils at High Shear Rate and High Temperature by Tapered
Bearing Simulator Viscometer at 150 °C
D5481 Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary
Viscometer
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and
Lubricants
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport
to Measure the Same Property of a Material
4
2.2 Coordinating European Council (CEC) Standard:
CEC L-36-90 The Measurement of Lubricant Dynamic Viscosity under Conditions of High Shear (Ravenfield)
3
For referenced ASTM standards, vi
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.