1、Designation:D474113Standard Test Method forMeasuring Viscosity at High Temperature and High ShearRate by Tapered-Plug Viscometer1This standard is issued under the fixed designation D4741;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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*1.1 This test method2covers the
3、 laboratory determination ofthe viscosity of oils at 150 C and 1 106s1and at 100 C and1 106s1,using high shear rate tapered-plug viscometermodels BE/C or BS/C.1.2 Newtonian calibration oils are used to adjust the work-ing gap and for calibration of the apparatus.These calibrationoils cover a range f
4、rom approximately 1.4 mPas to 5.9 mPas(cP)at 150 C and 4.2 mPas to 18.9 mPas(cP)at 100 C.Thistest method should not be used for extrapolation to higherviscosities than those of the Newtonian calibration oils used forcalibration of the apparatus.If it is so used,the precisionstatement will no longer
5、apply.The precision has only beendetermined for the viscosity range 1.48 mPas to 5.07 mPas at150 C and from 4.9 mPas to 11.8 mPas at 100 C for thematerials listed in the precision section.1.3 A non-Newtonian reference oil is used to check that theworking conditions are correct.The exact viscosity ap
6、propriateto each batch of this oil is established by testing on a numberof instruments in different laboratories.The agreed value forthis reference oil may be obtained from the chairman of theCoordinating European Council(CEC)Surveillance Group forCEC L-36-A90,or from the distributor.1.4 Applicabili
7、ty to products other than engine oils has notbeen determined in preparing this test method.1.5 This test method uses the millipascal seconds,mPas,asthe 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
8、 thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D91 Test Method for Precipit
9、ation Number of LubricatingOilsD4683 Test Method for Measuring Viscosity of New andUsed Engine Oils at High Shear Rate and High Tempera-ture by Tapered Bearing Simulator Viscometer at 150 CD5481 Test Method for Measuring Apparent Viscosity atHigh-Temperature and High-Shear Rate by Multicell Cap-illa
10、ry ViscometerD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Products andLubricantsD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a Material2.2 Coordi
11、nating European Council(CEC)Standard:4L36-A90 The Measurement of Lubricant Dynamic Viscosityunder Conditions of High Shear(Ravenfield)2.3 Energy Institute:5IP 370 Test Method for the Measurement of LubricantDynamic Viscosity Under Conditions of High Shear Usingthe Ravenfield Viscometer3.Terminology3
12、.1 Definitions:3.1.1 apparent viscosity,nviscosity of a non-Newtonianliquid determined by this test method at a particular shear rateand shear stress.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility of
13、Subcommittee D02.07 on Flow Properties.Current edition approved Oct.1,2013.Published November 2013.Originallyapproved in 1987.Last previous edition approved in 2012 as D4741 12.DOI:10.1520/D4741-13.2This test method is technically identical to that described in CEC L36A90(under the jurisdiction of t
14、he CEC Engine Lubricants Technical Committee)and inIP 370.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Availab
15、le from CEC Secretariat,Interlynk Administrative Services,Ltd.,LynkHouse,17 Peckleton Lane,Desford,Leicestershire,LE9 9JU,United Kingdom.5Available from Energy Institute,61 New Cavendish St.,London,WIG 7AR,U.K.*A Summary of Changes section appears at the end of this standardCopyright ASTM Internatio
16、nal,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.2 density,nmass per unit volume of the test liquid at agiven temperature.3.1.2.1 DiscussionIn SI notation,the unit of density is thekilogram per cubic metre.However,for practical use,gram percubic centimetre is customarily used and is equivalent to103kg/m3.3.1.3 kinematic viscosity,nratio of the viscosity(dynamic,absolute)to the density of the liquid.It is a measure of theresistance to flow of a liquid where
