1、Designation:B981/B981M12Standard Specification forLow Leaded Brass Rod,Bar and Shapes1This standard is issued under the fixed designation B981/B981M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number i
2、n parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification establishes the requirements for lowleaded brass rod,bar,wire,and shapes of any specified crosssection produced from Copper All
3、oys UNS No.C36300,C36500,C37000,C37100 and C37700 suitable for high-speedscrew machining applications.NOTE1Refer to Specification B124/B124M when purchasing bar orrod for forging production.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The valu
4、es stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its us
5、e.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:2B124/B124M Specification for Copper and Copper AlloyForging Rod,Bar,and Shape
6、sB249/B249M Specification for General Requirements forWrought Copper and Copper-Alloy Rod,Bar,Shapes andForgingsB250/B250M Specification for General Requirements forWrought Copper Alloy WireB601 Classification for Temper Designations for Copper andCopper AlloysWrought and CastE8/E8M Test Methods for
7、 Tension Testing of Metallic Ma-terials3.General Requirements3.1 The following sections of Specifications B249/B249M(rod,bar,and shapes)and B250/B250M(wrought copper alloywire)constitute a part of this specification.3.1.1 Terminology,3.1.2 Materials and Manufacture,3.1.3 Workmanship,Finish,and Appea
8、rance,3.1.4 Sampling,3.1.5 Number of Tests and Retest,3.1.6 Specimen Preparation,3.1.7 Test Methods,3.1.8 Significance of Numerical Limits,3.1.9 Inspection,3.1.10 Rejection and Rehearing,3.1.11 Certification,3.1.12 Mill Test Report,3.1.13 Packaging and Package Marking,and3.1.14 Supplementary Require
9、ments.3.2 In addition,when a section with a title identical to thosereferenced in 3.1 appears in this specification,it containsadditional requirements that supplement those appearing inSpecifications B249/B249M and B250/B250M.4.Ordering Information4.1 Include the following information when placing o
10、rdersfor product under this specification,as applicable:4.1.1 ASTM specification designation and year of issue(Bxxx/BxxxM XX).4.1.2 Copper Alloy UNS No.designations(C36300,C36500,C37000,C37100 and C37700,see Section 6 andTable 1.4.1.3 Temper(see Section 7 and Table 2 and Table 3).4.1.4 Product cross
11、 section form(for example,round,hexagonal,square,etc.).4.1.5 Dimensions(see Section 9).4.1.6 How furnished:straight lengths or coils(see 5.2).4.1.7 Edge contours(see Section 9).4.1.8 Quantity;total weight,footage,or number of piecesfor each size.4.2 The following options are available and shall be s
12、peci-fied at the time of placing the order when required:4.2.1 Tensile test requirement for product12in.12 mmand over(see 8.2).1This test method is under the jurisdiction of ASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,Bar,Wire,Shapes a
13、nd Forgings.Current edition approved April 1,2012.Published May 2012.DOI:10.1520/B0981_B0981M-12.2For 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 S
14、ummary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2.2 Certification(refer to Specifications B249/B249M orB250/B250M).4.2.3 Mill Test Report(refer to Specifications B249/B249Mor B250/B250M).4.2.4 When product
15、 is purchased for agencies of the U.S.Government see Section 11.5.Materials and Manufacture5.1 MaterialThe material of manufacture shall be a castbillet of Copper Alloys UNS No.C36300,C36500,C37000,C37100 and C37700 and of such purity and soundness as to besuitable for hot extrusion into rod,bar,wir
16、e,and shapedproducts.5.1.1 In the event that heat identification or traceability isrequired,the purchaser shall specify the details desired.NOTE2Due to the discontinuous nature of the processing of castingsinto wrought products,it is not always practical to identify a specificcasting analysis with a specific quantity of finished material.5.2 ManufactureProduct produced under this specifica-tion shall be in straight lengths;however,it shall be furnishedin coils when so specified in the contract o
