1、Designation:B15416Standard Test Method forMercurous Nitrate Test for Copper Alloys1This standard is issued under the fixed designation B154;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 parenth
2、eses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method describes the technique for conductingthe mercurous n
3、itrate test for residual stresses in wroughtcopper alloy mill products.NOTE1For any particular copper alloy,reference should be made tothe material specification.NOTE2Test Method B858 may be considered as a possible alternativetest method which does not involve the use of mercury.NOTE3This test meth
4、od is considered historically reliable fordetermining the potential state of residual stress in copper alloys,but notpromoted for use due to the hazards relating to mercury use andenvironmentally appropriate disposal.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units
5、 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 determines the applica-bility of regulato
6、ry limitations prior to use.For specificprecautionary and hazard statements see Sections 1,6,and 7.(WarningMercury has been designated by many regulatoryagencies as a hazardous substance that can cause seriousmedical issues.Mercury,or its vapor,has been demonstrated tobe hazardous to health and corr
7、osive to materials.Cautionshould be taken when handling mercury and mercury contain-ing products.See the applicable product Safety Data Sheet(SDS)for additional information.Users should be aware thatselling mercury and/or mercury containing products into yourstate or country may be prohibited by law
8、.)2.Referenced Documents2.1 ASTM Standards:2B846 Terminology for Copper and Copper AlloysB858 Test Method forAmmonia Vapor Test for DeterminingSusceptibility to Stress Corrosion Cracking in CopperAlloysD1193 Specification for Reagent Water3.Terminology3.1 For terms related to copper and copper alloy
9、s,refer toTerminology B846.4.Summary of Test Method4.1 The prepared test specimen is completely immersed inthe mercurous nitrate test solution for 30 min at ambienttemperature.Upon removal from the solution,the test speci-men is wiped and immediately examined visually for cracks.Test specimen and te
10、st supplies are discarded in accordancewith all federal,state,and local requirements.5.Significance and Use5.1 This test method is an accelerated test for detecting thepresence of residual(internal)stresses that might result infailure of individual parts in storage or in service due to stresscorrosi
11、on cracking.5.2 This test method is not intended for use on assemblies orparts under applied stress.If used for that purpose,the resultsshall be for information only and not a cause for rejection ofthe assembly,its component parts,or the original mill product.6.Reagents and Materials6.1 Purity of Re
12、agentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents conform to the specifications of the Committee onAnalytical Reagent of the American Chemical Society wheresuch specifications are available.3Other grades may be used,provided it is firs
13、t ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.1This test method is under the jurisdiction of ASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.06 onMethods of Test.Cur
14、rent edition approved Oct.1,2016.Published November 2016.Originallyapproved in 1941.Last previous edition approved in 2012 as B154 121.DOI:10.1520/B0154-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMSta
15、ndards volume information,refer to the standards Document Summary page onthe ASTM website.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washington,DC.For Suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for
16、LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USP),Rockville,MD.*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 6.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean Type IV reagent water orbetter,as defined in Specification D1193.6.3 Mercuro