1、Designation:B21/B21M14Standard Specification forNaval Brass Rod,Bar,and Shapes1This standard is issued under the fixed designation B21/B21M;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 specification establishes the requirements for navalbrass rod,bar
3、,and shapes produced from Copper Alloy UNSNos.C46200,C46400,C46750,C47940,C48200,or C48500.1.1.1 For piston-finish rod or shafting refer to the OtherRequirements Section.1.1.2 For hot forging material,refer to Specification B124/B124M.1.2 UnitsThe values stated in inch-pound units or SI unitsare to
4、be regarded separately as standard.Within the text,SIunits are shown in brackets.The values stated in each systemmay not be exact equivalents;therefore,each system shall beused independently of the other.Combining values from thetwo systems may result in nonconformance with the specifi-cation.1.3 Wa
5、rningMercury is a definite health hazard in useand disposal(see Performance Requirements).1.4 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
6、and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B124/B124M Specification for Copper and Copper AlloyForging Rod,Bar,and ShapesB154 Test Method for Mercurous Nitrate Test for CopperAlloysB249/B249M Specification for General Requirement
7、s forWrought Copper and Copper-Alloy Rod,Bar,Shapes andForgingsB601 Classification for Temper Designations for Copper andCopper AlloysWrought and CastB858 Test Method forAmmonia Vapor Test for DeterminingSusceptibility to Stress Corrosion Cracking in CopperAlloysE8/E8M Test Methods for Tension Testi
8、ng of Metallic Ma-terialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE62 Test Methods for Chemical Analysis of Copper andCopperAlloys(Photometric Methods)(Withdrawn 2010)3E478 Test Methods for Chemical Analysis of Copper Alloys3.General Requirements3.1 The following sections of Spec
9、ification B249/B249Mconstitute a part of this specification:3.1.1 Terminology,3.1.2 Materials and Manufacture,3.1.3 Workmanship,Finish,and Appearance,3.1.4 Sampling,3.1.5 Number of Tests and Retests,3.1.6 Specimen Preparation,3.1.7 Test Methods,3.1.8 Significance of Numerical Limits,3.1.9 Inspection
10、,3.1.10 Rejection and Rehearing,3.1.11 Certification,3.1.12 Mill Test Report,3.1.13 Packaging and Product Marking,and3.1.14 Supplementary Requirements.3.2 In addition,when a section with a title identical to thatreferenced in 3.1,above,appears in this specification,itcontains additional requirements
11、 which supplement those ap-pearing in Specification B249/B249M.4.Ordering Information4.1 Include the following specified choices when placingorders for product under this specification,as applicable:4.1.1 ASTM designation and year of issue,1This specification is under the jurisdiction ofASTM Committ
12、ee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,Bar,Wire,Shapes and Forgings.Current edition approved Sept.1,2014.Published September 2014.Originallyapproved in 1918.Last previous edition approved in 2012 as B21/B21M 12.DOI:10.1520/B0021_B0021M-14.2Fo
13、r 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
14、onwww.astm.org.*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 4.1.2 Copper Alloy UNS No.designation(Scope),4.1.3 Temper(Temper Section and related Tables),4.1.4 Formcross-s
15、ection such as round,hexagonal,square,and so forth,4.1.5 Diameter or distance between parallel surfaces,widthand thickness(Dimensions and Permissible Variations),4.1.6 Length(Dimensions and Permissible Variations),4.1.7 Edgecontours(DimensionsandPermissibleVariations),4.1.8 Quantitynumber of pieces
16、or total weight,for eachsize and form,and4.1.9 Intended application.4.2 The following options are available,but may not beincluded,unless specified at the time of placing of the orderwhen required:4.2.1 Tensile test for product12in.12 mm and over,forthe alloys and tempers listed in Table 4.4.2.2 Residual stress test(Performance Requirementssection),4.2.3 Piston finish rod or shafting(Other Requirementssection),4.2.4 Certification(Specification B249/B249M),4.2.5 Mill test report(Specification B24
