ASTM_D_5706_-_11.pdf

Designation:D570611Standard Test Method forDetermining Extreme Pressure Properties of LubricatingGreases Using a High-Frequency,Linear-Oscillation(SRV)Test Machine1This standard is issued under the fixed designation D5706;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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.1.Scope*1.1 This test method covers a procedure for determiningextreme pressure properties of lubricating greases under high-frequency linear-oscillation motion using the SRV test ma-chine.This test method can also be used for evaluating extremepressure properties of lubricating fluid.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of 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:2A295/A295M Specification for High-Carbon Anti-FrictionBearing SteelD217 Test Methods for Cone Penetration of LubricatingGreaseD4175 Terminology Relating to Petroleum,PetroleumProducts,and LubricantsD6425 Test Method for Measuring Friction and Wear Prop-erties of Extreme Pressure(EP)Lubricating Oils UsingSRV Test MachineD7421 Test Method for Determining Extreme PressureProperties of Lubricating Oils Using High-Frequency,Linear-Oscillation(SRV)Test MachineE45 Test Methods for Determining the Inclusion Content ofSteelG40 Terminology Relating to Wear and Erosion2.2 Other Standards:3DIN EN ISO 683-17 Heat-treated Steels,alloy steels andfree-cutting steels Part 17:Ball and roller bearing steelsDIN EN ISO 13565-2:1998 Geometrical Product Specifica-tions(GPS)Surface texture:Profile method;Surfaceshaving stratified functional properties Part 2:Heightcharacterization using linear material ratio curve(replacesDIN 4776:1990:Measurement of surface roughness;pa-rameters RK,RPK,RVK,Mr1,Mr2for the description of thematerial portion)3.Terminology3.1 Definitions:3.1.1 break-in,nin tribology,an initial transition processoccurring in newly established wearing contacts,often accom-panied by transients in coefficient of friction or wear rate,orboth,which are uncharacteristic of the given tribologicalsystems long-term behavior.G403.1.2 coeffcient of friction,or f,nin tribology,thedimensionless ratio of the friction force(F)between twobodies to the normal force(N)pressing these bodies together.G403.1.3 Hertzian contact area,nthe apparent area of contactbetween two nonconforming solid bodies pressed against eachother,as calculated from Hertzs equations of elasticdeformation.G403.1.4 Hertzian contact pressure,nmagnitude of the pres-sure at any specified location in a Hertzian contact area,ascalculated from Hertzs equations of elastic deformation.TheHertzian contact pressure can also be calculated and reportedas maximum value Pmaxin the centre of the contact or asPaverageas average over the total contact area.D74213.1.5 lubricant,nany material interposed between twosurfaces that reduces the friction or wear,or both,betweenthem.D41751This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.G0.04 on Functional Tests-Tribology.Current edition approved Dec.1,2011.Published March 2012.Originallyapproved in 1995.Last previous edition approved in 2011 as D570605(2011)1.DOI:10.1520/D5706-11.2For 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.3Available from Deutsches Institut fur Normung e.V.(DIN),Burggrafenstrasse 6,10787 Berlin,Germany,http:/www.din.de.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.6 lubricating grease,na semi-fluid to solid product ofa dispersion of a thickener in a liquid lubricant.D2173.1.6.1 DiscussionThe dispersion of the thickener forms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces.Other ingredients arecommonly included to impart special properties.3.1.7 thickener,nin lubricating grease,a substance com-posed of finely divided solid particles dispersed in a liquidlubricant to form the grease structure.D2173.1.7.1 DiscussionThe thickener can be fibers(such asvarious metallic soaps)or plates or spheres(such as certainnon-soap thickeners)which are insoluble or,at most,only veryslightly soluble in the liquid lubricant.The general r