1、Designation:B271/B271M15Standard Specification forCopper-Base Alloy Centrifugal Castings1This standard is issued under the fixed designation B271/B271M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A numbe
2、r in parentheses indicates the year of last reapproval.A superscript 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 requirements for centrifu-
3、gal castings of copper-base alloys having the nominal compo-sitions shown in Table 1.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of
4、the other.Combiningvalues from the two systems may result in non-conformancewith the standard.2.Referenced Documents2.1 The following documents in the current issue of theBook of Standards form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B208 Practice for Preparin
5、g Tension Test Specimens forCopper Alloy Sand,Permanent Mold,Centrifugal,andContinuous CastingsB824 Specification for General Requirements for CopperAlloy CastingsB846 Terminology for Copper and Copper AlloysE10 Test Method for Brinell Hardness of Metallic Materials2.3 ASME Code:3Boiler and Pressure
6、 Vessel Code3.Terminology3.1 Definitions of terms relating to copper alloys can befound in Terminology B846.4.Ordering Information4.1 Orders for centrifugal castings under this specificationshould include the following information:4.1.1 Specification title,number,and year of issue,4.1.2 Quantity(len
7、gth or number)of castings,4.1.3 Copper Alloy UNS Number(Table 1)and temper(as-cast,heat-treated,and so forth),4.1.4 Dimensions or drawing number and condition(as-cast,machined,and so forth),4.1.5 ASME Boiler and Pressure Vessel Code requirements(Section 9),4.1.6 When castings are purchased for agenc
8、ies of the U.S.Government,the Supplementary Requirements in SpecificationB824 may be specified.4.2 The following are optional and should be specified inthe purchase order when required:4.2.1 Pressure test or soundness requirements(SpecificationB824),4.2.2 Approval of weld repair(Section 8),4.2.3 Cer
9、tification(Specification B824),4.2.4 Foundry test report(Specification B824),4.2.5 Witness inspection(Specification B824),4.2.6 Product marking(Specification B824),and4.2.7 Castings for seawater service(Section X1.2).5.Materials and Manufacture5.1 Castings in Copper Alloy UNS No.C95520 are used inth
10、e heat treated condition only.6.Chemical Composition6.1 The centrifugal castings shall conform to the chemicalrequirement shown in Table 2 for the Copper Alloy UNSNumbers specified in the purchase order.6.2 These specification limits do not preclude the presenceof other elements.Limits may be establ
11、ished and analysisrequired for unnamed elements agreed upon between themanufacturer or supplier and the purchaser.Copper or zincmay be given as remainder and may be taken as the differencebetween the sum of all elements analyzed and 100%.When allnamed elements in Table 2 are analyzed,their sum shall
12、 be asspecified in Table 3.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.05 onCastings and Ingots for Remelting.Current edition approved July 1,2015.Published July 2015.Originally approvedin 1954.Las
13、t previous edition approved in 2014 as B271/B271M 14a.DOI:10.1520/B0271_B0271M-15.2For 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 ont
14、he ASTM website.3Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West C
15、onshohocken,PA 19428-2959.United States1 7.Mechanical Properties7.1 Mechanical properties shall be determined from test barcastings cast in accordance with Practice B208 and shall meetthe requirements shown in Table 4.8.Weld Repair8.1 The castings shall not be weld repaired without cus-tomer approva
16、l.9.ASME Requirements9.1 When specified in the purchase order to meet ASMEBoiler and Pressure Vessel Code requirements castings inCopper Alloy UNS Nos.C95200 and C95400 shall complywith the following:9.1.1 Certification requirements of Specification B824.9.1.2 Foundry test report requirements of SpecificationB824.9.1.3 Castings shall be marked with the manufacturersname,the Copper Alloy UNS No.,and the casting qualityfactor.In addition,heat numbers or serial numbers that aretraceable to heat num
