ASTM D4741-13
(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
SCOPE
1.1 This test method2 covers the laboratory determination of the viscosity of oils at 150 °C and 1 × 106s–1 and at 100 °C and 1 × 106s–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-A90, or from the distributor.
1.4 Applicability to products other than engine oils has not been determined in preparing this test method.
1.5 This test method uses the millipascal seconds, mPa·s, as the unit of viscosity. For information, the equivalent cgs unit, centipoise, cP, is shown in parentheses.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D4741 − 13
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 Department of Defense.
1. Scope* priate safety and health practices and determine the applica-
2 bility of regulatory limitations prior to use.
1.1 Thistestmethod coversthelaboratorydeterminationof
6 –1
theviscosityofoilsat150°Cand1×10 s andat100°Cand
6 –1 2. Referenced Documents
1×10 s , using high shear rate tapered-plug viscometer
3
2.1 ASTM Standards:
models BE/C or BS/C.
D91Test Method for Precipitation Number of Lubricating
1.2 Newtonian calibration oils are used to adjust the work-
Oils
ing gap and for calibration of the apparatus. These calibration
D4683Test Method for Measuring Viscosity of New and
oils cover a range from approximately 1.4mPa·s to 5.9 mPa·s
Used Engine Oils at High Shear Rate and High Tempera-
(cP)at150°Cand4.2mPa·sto18.9mPa·s(cP)at100°C.This
ture by Tapered Bearing Simulator Viscometer at 150 °C
test method should not be used for extrapolation to higher
D5481Test Method for Measuring Apparent Viscosity at
viscositiesthanthoseoftheNewtoniancalibrationoilsusedfor
High-TemperatureandHigh-ShearRatebyMulticellCap-
calibration of the apparatus. If it is so used, the precision
illary Viscometer
statement will no longer apply. The precision has only been
D6300Practice for Determination of Precision and Bias
determined for the viscosity range 1.48mPa·s to 5.07 mPa·s at
Data for Use in Test Methods for Petroleum Products and
150 °C and from 4.9mPa·s to 11.8 mPa·s at 100°C for the
Lubricants
materials listed in the precision section.
D6708Practice for StatisticalAssessment and Improvement
1.3 Anon-Newtonian reference oil is used to check that the
of Expected Agreement Between Two Test Methods that
workingconditionsarecorrect.Theexactviscosityappropriate
Purport to Measure the Same Property of a Material
to each batch of this oil is established by testing on a number
4
2.2 Coordinating European Council (CEC) Standard:
of instruments in different laboratories. The agreed value for
L36-A90TheMeasurementofLubricantDynamicViscosity
this reference oil may be obtained from the chairman of the
under Conditions of High Shear (Ravenfield)
Coordinating European Council (CEC) Surveillance Group for
5
2.3 Energy Institute:
CEC L-36-A90, or from the distributor.
IP 370Test Method for the Measurement of Lubricant
1.4 Applicability to products other than engine oils has not
DynamicViscosityUnderConditionsofHighShearUsing
been determined in preparing this test method.
the Ravenfield Viscometer
1.5 This test method uses the millipascal seconds, mPa·s, as
the unit of viscosity. For information, the equivalent cgs unit, 3. Terminology
centipoise, cP, is shown in parentheses.
3.1 Definitions:
1.6 This standard does not purport to address all of the
3.1.1 apparent viscosity, n—viscosity of a non-Newtonian
safety concerns, if any, associated with its use. It is the liquid determined by this test method at a particular shear rate
responsibility of the user of this standard to establish appro-
and shear stress.
1
This test method is under the jurisdiction of ASTM Committee D02 on
3
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Subcommittee D02.07 on Flow Properties. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Oct. 1, 2013. Published November 2013. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1987. Last previous edition approved in 2012 as D4741–12. DOI: the ASTM website.
4
10.1520/D4741-13. Available from CEC Secretariat, InterlynkAdministrative Services, Ltd., Lynk
2
This test method is technically identical to that described in CEC L36–A90 House, 17 Peckleton Lane, Desford, Leicestershire, LE9 9JU, United Kingdom.
5
(under the jurisdiction of the CEC Engine Lubricants Technical Committee) and in Available from Energy Institute, 61 New Cavendish St., London, WIG 7AR,
IP370. U.K.
*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
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D4741 − 13
3.1.2 density, n—massperunitvolumeofthetestliquidata viscosity is de
...
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 − 12 D4741 − 13
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 Department of Defense.
1. Scope*
2 6 –1
1.1 This test method covers the laboratory determination of the viscosity of oils at 150°C150 °C and 1 × 10 s and at
6 –1
100°C100 °C and 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 1.81.4 mPa·s to 5.9 mPa-smPa·s (cP) at 150°C150 °C and 4.24.2 mPa·s to 18.9 mPa-smPa·s (cP)
at 100°C.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-A90, or from the distributor.
1.4 Applicability to products other than engine oils has not been determined in preparing this test method.
1.5 This test method uses the millipascal seconds, mPa-s,mPa·s, as the unit of viscosity. For information, the equivalent cgs unit,
centipoise, cP, is shown in parentheses.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
3
2.1 ASTM Standards:
D91 Test Method for Precipitation Number of Lubricating Oils
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 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:
L36-A90 The Measurement of Lubricant Dynamic Viscosity under Conditions of High Shear (Ravenfield)
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.07 on Flow Properties.
Current edition approved Nov. 1, 2012Oct. 1, 2013. Published February 2013November 2013. Originally approved in 1987. Last previous edition approved in 20062012
as D4741D4741 – 12.–06. DOI: 10.1520/D4741-12.10.1520/D4741-13.
2
This test method is technically identical to that described in CEC L36–A90 (under the jurisdiction of the CEC Engine Lubricants Technical Committee) and in IP 370.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from CEC Secretariat, Interlynk Administrative Services, Ltd., Lynk House, 17 Peckleton Lane, Desford, Leicestershire, LE9 9JU, United Kingdom.
*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 −
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