ASTM_G_132_-_96_2013.pdf

Designation:G13296(Reapproved 2013)Standard Test Method forPin Abrasion Testing1This standard is issued under the fixed designation G132;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.Scope1.1 This test method covers a laboratory procedure fordetermining the wear resistance of a material when relativemotion is caused between an abrasive cloth,paper,or plasticfilm and a contacting pin of the test material.The principalfactors and conditions requiring attention when using this typeof apparatus to measure wear are discussed.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.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:2A128/A128M Specification for Steel Castings,AusteniticManganeseA514/A514M SpecificationforHigh-Yield-Strength,Quenched and Tempered Alloy Steel Plate,Suitable forWeldingE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF732 Test Method for Wear Testing of Polymeric MaterialsUsed in Total Joint ProsthesesG40 Terminology Relating to Wear and ErosionG99 Test Method for Wear Testing with a Pin-on-DiskApparatus3.Terminology3.1 Refer to Terminology G40 for definitions of termsrelated to this test method.4.Summary of Test Method4.1 For the pin abrasion test method,two pin specimens arerequired.One is of the test material.The other is of a referencematerial.Each pin,in turn,is positioned perpendicular to theabrasive surface,which usually is mounted on,or supported by,a flat circular disk,another flat surface,or the cylindricalsurface of a drum.The test machine permits relative motionbetween the abrasive surface and the pin surface.The weartrack of a pin describes a continuous,non-overlapping pathsuch as a spiral,helix,or saw-tooth curve,preferably with adisplacement between successive passes sufficient to allow theother pin to trace a parallel track in the intervening space.Fig.1 shows some possible arrangements.The pin specimen ispressed against the abrasive surface with a specified loading bymeans of dead weights or another suitable loading system.Rotation of the pin about its axis during testing is optional.Note,however,that results with and without pin rotation orwith different loading systems may differ.4.2 The amount of wear is determined by weighing bothspecimens before and after testing.Mass loss values should beconverted to volume losses using the best available values ofspecimen densities.The use of length changes to indicate theamount of wear is not recommended for the purposes of thistest method,and no procedure for processing such data isincluded in this test method.4.3 Wear results are reported as a volume loss and as thewear volume normalized with respect to the applied normalload,to the wear path length,and to the mean wear of thereference specimen on the same type of abrasive.The referencespecimen wear is included in the calculation in order to correctfor abrasivity variations(see 4.5 and 10.2).4.4 Various sizes and types of abrasive have been used.These include silicon carbide,alumina,emery,garnet,flint,orother silicas,and synthetic compounds,but wear resultsnormally will differ with different types of abrasive(see TableX3.1).The abrasive is bonded to a cloth,paper,or plastic film1This test method is under the jurisdiction of ASTM Committee G02 on Wearand Erosion and is the direct responsibility of Subcommittee G02.30 on AbrasiveWear.Current edition approved Nov.15,2013.Published November 2013.Originallyapproved in 1995.Last previous edition approved in 2007 as G13296(2007).DOI:10.1520/G0132-96R13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1(usually polyester)backing that is mounted on or supported bya smooth,firm surface(for example,disk,other flat,orcylinder).For purposes of this test method,a garnet is thepreferred abrasive and has given good correlations with manytypes of abrasive services(1).3The field experience hasincluded a wide variety of abrasive minerals,