ASTM_G_174_-_04_2009e1.pdf

Designation:G17404(Reapproved 2009)1Standard Test Method forMeasuring Abrasion Resistance of Materials by AbrasiveLoop Contact1This standard is issued under the fixed designation G174;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.1NOTEMinor editorial changes were made throughout in May 2009.1.Scope1.1 This test method covers ranking rigid engineering ma-terials for abrasion resistance in rubbing against aluminumoxide abrasive finishing tape.Though most solids can betested,this test method addresses its use for metals,andcoatings applied to metals.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:2E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE178 Practice for Dealing With Outlying ObservationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG40 Terminology Relating to Wear and ErosionG117 Guide for Calculating and Reporting Measures ofPrecision Using Data from Interlaboratory Wear or Ero-sion TestsG132 Test Method for Pin Abrasion Testing3.Terminology3.1 Definitions:3.1.1 abrasive wear,nwear due to hard particles or hardprotuberances forced against,and moving along,a solidsurface.3.2 Definitions of Terms Specific to This Standard:3.2.1 abrasion,nthe process of abrasive wear.3.2.1.1 DiscussionTerminology G40 does not define abra-sion.3.2.2 abrasion resistance,nin tribology,the ability of amaterial to resist damage or attrition by abrasion.3.2.3 fixed abrasive tape,nhard particles or grains bonded(fixed)to one side of a flexible web with a resin or similarbinder.The particles can be of any hard material and vary insize.(This abrasive medium is also known as“finishing tape,”“microfinishing tape,”“microfinishing film,”or“finishingfilm.”)3.2.4 flexible web,nplastic,paper,rubber,or other mate-rial that is thin enough to conform to a 180 wrap around a16-mm diameter cylinder under a tension of less than1.8 kg/cm width.4.Summary of Test Method4.1 This test involves rubbing an abrasive tape loop initiallyin line-contact with a solid surface.The tape abrasion producesa groove in the test surface,and the volume of materialremoved in a designated amount of abrasive rubbing ismeasured by mass loss or by calculation from the groovegeometry.The continuous loop of abrasive is used for theduration of the test and then discarded.A fresh loop is used foreach one-hour test.4.2 The wear volume produced in this test provides ameasure of the ability of a surface to resist wear damage fromabrasive substances.The smaller the wear volume in this test,the better the abrasion resistance.4.3 The test was developed using 30 m-mean diameteraluminum oxide abrasive on a 127 m-thick polyester support,but other commercially available abrasive tapes could be used.The test has also been used with webs such as paper that areinherently abrasive to many materials.1This 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 May 1,2009.Published May 2009.Originallyapproved in 2003.Last previous edition approved in 2004 as G17404.DOI:10.1520/G0174-04R09E01.2For 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 5.Significance and Use5.1 This test is useful for screening materials for use in toolsthat are subjected to abrasion from the material that is beingmachined,worked,or formed.It has been used to screen toolsteels for punch press dies,hardfacings for earth-movingmachinery,and wear coatings.This is simpler to build and usethan those used in the Test Method G132 abrasion test which,like this test,uses a fixed abrasive counterface to abrade a testmaterial.5.2 The one-hour test is intended for metals and materialsthat are softer than hardened steel(67 HRC),but may beapplied to harder materials(see 7.1.7).6.Apparatus6.1 The test apparatus used in interlaboratory tests is illus-trated in Fig.1.A132-cm long by 25.4-mm wide abrasive tapeis made into a continuous loop with a pressure sensitiveadhesive(PSA)butt splice(Fig.2).The web is tensioned tofor