1、Designation:A327/A327M11(Reapproved 2017)Standard Test Methods forImpact Testing of Cast Irons1This standard is issued under the fixed designation A327/A327M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A
2、 number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods for impact testing cover the detailsof apparatus,test specimens,and procedures for cast iron,including gray iron,white
3、 iron,malleable iron,ductile iron,and austempered ductile iron,but not including chilled rolls orrolls with white iron skins.1.2 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;theref
4、ore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance with the standard.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 t
5、o establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Princi
6、ples for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A327M Test Methods for Impact Testing of Cast Irons(Metric)(Withdrawn 2011)3E23 Test Methods for No
7、tched Bar Impact Testing of Me-tallic MaterialsTEST METHOD A ROUND BAR CHARPY-TYPEIMPACT TEST FOR GRAY AND WHITE IRONS3.Scope3.1 The Charpy-type impact test shall be employed fortesting gray and white irons.4.Apparatus4.1 The single-blow Charpy impact test for gray and whiteirons shall be carried ou
8、t in a pendulum-type impact machinewith a capacity of at least 150 J 110 ft lbf as used for thesimple beam test for steel described in Test Methods E23.5.Test Specimens5.1 The test specimens shall have a plain cylindrical form,machined or ground to a smooth finish and shall conform to thefollowing d
9、imensions:Type AType MDiameter28.572 0.050 mm1.125 0.002 in.20.00 0.03 mm0.787 0.001 in.Length200 13 mm8.0 0.5 in.120 2 mm4.73 0.08 in.Span152.0 0.7 mm6.00 0.03 in.100.0 0.5 mm3.937 0.020 in.6.Procedure6.1 Test the bars on the spans indicated in the tabular data of5.1.In all other respects,the test
10、shall conform to theappropriate requirements of Test Methods E23.6.2 Make the test at room temperature.6.3 Characterization of the fracture toughness of any castiron should be based upon testing at least three specimens.NOTE1Care should be taken to examine broken specimens forindication of anvil int
11、erference,which will give erroneous results.7.Report7.1 The results shall be reported as _J ft lbf cast ironCharpy impact with _ mm in.diameter bar.TEST METHOD B STANDARD CHARPY-TYPEIMPACT TEST FOR MALLEABLE AND DUCTILEIRONS8.Scope8.1 Either the standard notched or unnotched Charpy impacttest shall
12、be employed in testing of malleable or ductile irons.1These test methods are under the jurisdiction ofASTM Committee A04 on IronCastings and are the direct responsibility of Subcommittee A04.21 on Testing.Current edition approved Oct.1,2017.Published October 2017.Originallyapproved in 1950.Last prev
13、ious edition approved in 2011 as A327/A327M 11.DOI:10.1520/A0327_A0327M-11R17.2For 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 A
14、STM 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 StatesThis international standard was developed in accordance with internationally recognized principl
15、es on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 Selection of the type bar is dependent upon the specificmaterial to be evaluated
16、 as defined in Section 9.8.2 Both types of Charpy bars have been designated tocharacterize the fracture toughness of irons.The unnotchedCharpy bar,when tested,will produce substantially higherenergy values than the notch bar type.The unnotched bar istherefore specified for testing irons that have low fracturetoughness characteristics.9.Charpy Test Bar Type9.1 Unless specified otherwise,the notched bar type speci-mens in Fig.1 or Fig.2(for pipe-type products)shall beemployed.Exceptions are define
