ASTM_G_81_-_97a_2013.pdf

Designation:G8197a(Reapproved 2013)Standard Test Method forJaw Crusher Gouging Abrasion Test1This standard is issued under the fixed designation G81;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a laboratory procedure todetermine the relative gouging abrasion resistance of materials.Materials homogeneous in structure and properties are the mostappropriate test materials;however,surface-treated and com-posite materials can also be tested.The test involves a smalllaboratory jaw crusher that crushes presized hard rockmaterials,such as a hard morainal gravel,or some othercrushable substance.1.2 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.(See 8.1 on SafetyPrecautions.)2.Referenced Documents2.1 ASTM Standards:2A128/A128M Specification for Steel Castings,AusteniticManganeseA514/A514M SpecificationforHigh-Yield-Strength,Quenched and Tempered Alloy Steel Plate,Suitable forWeldingA517/A517M Specification for Pressure Vessel Plates,AlloySteel,High-Strength,Quenched and TemperedE10 Test Method for Brinell Hardness of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE30 Test Methods for ChemicalAnalysis of Steel,Cast Iron,Open-Hearth Iron,and Wrought Iron(Withdrawn 1995)3E140 Hardness Conversion Tables for Metals RelationshipAmong Brinell Hardness,Vickers Hardness,RockwellHardness,Superficial Hardness,Knoop Hardness,Sclero-scope Hardness,and Leeb HardnessE350 Test Methods for Chemical Analysis of Carbon Steel,Low-Alloy Steel,Silicon Electrical Steel,Ingot Iron,andWrought IronE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG40 Terminology Relating to Wear and Erosion3.Terminology3.1 Definitions:3.1.1 gouging abrasionsevere form of abrasive wear inwhich the force between an abrading body and the wearingsurface is sufficiently large that a macroscopic gouge,groove,deep scratch,or indentation can be produced in a singlecontact.3.1.2 The definitions of some other related terms may befound in Terminology G40.3.2 Definitions of Terms Specific to This Standard:3.2.1 cheek plateswear liners that protect the sides of thecrusher adjacent to the movable and stationary jaws.3.2.2 movable jawpart of the crusher that moves againstthe material being crushed.3.2.3 reference platejaw plate made of a material uniformin microstructure and hardness and not varying significantlyfrom one piece to another;such a plate will give highlyreproducible results,to which other materials to be tested maybe compared.3.2.4 stationary jawpart of the crusher that does notarticulate,but is directly opposite the movable jaw and is indirect crushing contact.3.2.5 test platejaw plate made of a material for which thegouging abrasion resistance is to be measured.3.2.6 toggle plateplate that holds the bottom edge of themovable jaw relative to the stationary jaw.4.Summary of Test Method4.1 A small laboratory jaw crusher with a feed opening ofabout 100 by 150 mm(4 by 6 in.)is modified to accept aneasily machined identical pair of reference wear plates and apair of similar test wear plates.One test plate and one referenceplate are attached to the stationary jaw frame of the crusher,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 Nov.15,2013.Published November 2013.Originallyapproved in 1983.Last previous edition approved in 2007 as G8197a(2007).DOI:10.1520/G0081-97AR13.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and the other test and reference plate are attached to themovable jaw frame,such that a reference plate and a test plateoppose one another.The minimum jaw opening is set at3.2 mm(0.125 in.),and a 225-kg(500-lb)load of prescreenedmaterial of suitable hardness is run through the crusher.Theminimum opening is then reset to 3.2 mm(0.125 in.)andanother 225 kg(500 lb)of rock is crushed.This is repeateduntil a minimum of 900 kg(2000 lb)of rock is crushed.Theprecleaned and weighed test plates are then recleaned andweighed,and the mass loss(in grams)is recorded.The volumeloss m